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PROCEEDINGS OF THE DESERT FISHES COUNCIL
<br />Museum of Natural History, Zoological Series
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<br />Secretaria de Desarrollo Urbano y Ecologia. 1991.
<br />Acuerdo por el que se establecen los criterios
<br />ecol6gicos CT-CERN-001-91 que determinan las
<br />especies raras, amenazadas, en peligro de extinci6n
<br />o sujectas a protecci6n especial y sus endemismos de
<br />la flora y la fauna terrestres y acuaticas en la
<br />Republica Mexicana. Gaceta Ecol6gica 3(15):2-27.
<br />Sedlock, Richard L., Fernando Ortega-Gutierrez &
<br />Robert C. Speed. 1993. Tectonostratigraphic terranes
<br />and tectonic evolution of Mexico. Geological Society
<br />of America Special Paper 278:1-vi, 1-153.
<br />& . 1993. Part 1: Tectonos trati graphic
<br />terranes of Mexico. Pp. 2-74, in Ibid.
<br />, Robert C. Speed, and Fernando
<br />Ortega-Gutierrez. 1993. Part 2: Tectonic evolution of
<br />Mexico, Pp. 74-153, in Ibid.
<br />Secretaria de Desarrollo Urbano y Ecologia. 1983.
<br />Proyecto ejecutivo de ordenamiento ecol6gico para
<br />la conservaci6n y aprovechamiento del area
<br />recreativa y cultural Poza la Becerra, Cuatro
<br />Ci6negas, Coahuila. Secretaria de Desarrollo
<br />Urbano y Ecologia (SEDUE), Distrito Federal,
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<br />1987. Plan de manejo integral del Valle de
<br />Cuatro Ci6negas, Coahuila. Ibid.
<br />Seeler, Jacob-Sebastian & Stjepko Golubic. 1991.
<br />Iyengariella endolithica sp. nov., a carbonate boring
<br />stigonematalean cyanobacterium from a warm
<br />spring-fed lake: Nature to culture. Archiv fur
<br />Hydrobiologie Algological Studies Supplement
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<br />Seidel, Michael E. 1978. Kinosternon flavescens.
<br />Catalog of American Amphibians & Reptiles
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<br />Sharitz, R. R. & J. W. Gibbons (eds.). 1989.
<br />Freshwater Wetlands and Wildlife: Perspectives
<br />on Natural, Managed, and Degraded Ecosystems.
<br />U.S. Department of Energy, Office of Scientific &
<br />Technical Information, Oak Ridge, Tennessee USA.
<br />Shard, M. & J. H. Schroeder. 1988. A new species of
<br />the genus Xiphophorus Heckel 1848, endemic to
<br />northern Coahuila, Mexico. Senckanbergiana
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<br />Shreve, Forest. 1942. Grassland and related vegetation
<br />in northern Mexico. Madrono 6:190-198.
<br />. 1944. Rainfall in northern Mexico. Ecology
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<br />Singewald, Q. D. 1936. Evolution of the Coahuila
<br />Peninsula, Mexico. Part V. Igneous phenomena and
<br />geologic structure near Mapimi. Bulletin of the
<br />Geological Society of America 47:1153-1176, 5 pls.
<br />Soderstrom, T. 1967. Taxonomic study of subgenus
<br />Podostemum and section Epicampes of Muhlenbergia
<br />(Gramineae). Contributions of the U. S. National
<br />Herbarium 34(4):756-189, 14 pls.
<br />1993 - VOLUME XXV
<br />Soleglad, Michael E. 1974. Vejovis calidus, a new
<br />species of scorpion from Coahuila, Mexico
<br />(Scorpionida: Vejovidae). Entomological News
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<br />Smalley, A. E. 1964. A new Palaemonetes from
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<br />Smith, C. I. & S. B. Katz (eds.). Lower Cretaceous
<br />stratigraphy and structure, northern Mexico. West
<br />Texas Geological Society Field Trip Guidebook,
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<br />Smith, D. C. 1982. Trophic ecology of the cichlid
<br />morphs of Cuatro Cienegas, Mexico. Master's
<br />Thesis. University of Maine at Orono, Orono USA.
<br />Smith, Hobart M. 1971. Distribution of the racer
<br />Coluber constrictor in Mexico. Journal of
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<br />& Louis F. Janes. 1958. The taxonomic
<br />significance of cloacal bursae in turtles.
<br />Transactions of the Kansas Academy of Science
<br />61(l):86-96.
<br />& Louis W. Ramsey. 1952. A new turtle from
<br />Texas. Wasmann Journal of Biology 10(1):45-54..
<br />& Rozzella B. Smith. 1979. Synopsis of the
<br />Herpetofauna of Mexico. VI. Guide to Mexican
<br />Turtles. John Johnson, North Bennington, Vermont
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<br />& Edward H. Taylor. 1945. An annotated
<br />checklist and key to the snakes of Mexico. Bulletin
<br />of the U.S. National Museu n 187:1-iv + 1-239.
<br />& . 1948. An annotated checklist and key to
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<br />& . 1950. An annotated checklist and key to
<br />the reptiles of Mexico exclusive of the snakes. Ibid.
<br />199:1-iv + 1-253.
<br />& 1966. Herpetology of Mexico:
<br />Annotated Checklists and Keys to the Amphibians
<br />and Reptiles. Eric Lundberg, Ashton, Maryland
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<br />Smith, Michael L. 1981. Late Cenozoic fishes in the
<br />warm deserts of North America: A reinterpretation
<br />of desert adaptations. Pp. 11-38, in Robert J.
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<br />American Deserts. John Wiley & Sons, New York
<br />USA.
<br />& Robert Rush Miller. 1986. The evolution of
<br />the Rio Grande basin as inferred from its fish fauna.
<br />Pp. 457-486 + lit. cited, in Charles H. Hocutt &
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<br />Solis-Rojas, Carlos & G. Rodriguez-Almaraz. 1994.
<br />The Arachnids (Chelicerata: Arachnida) of the Valley
<br />of Cuatro C16negas, Coahuila, Mexico. Proceedings
<br />of the Desert Fishes Council 25(1993):42 (abstr.).
<br />Sommerfeld, Milton R. & Dennis M. Kubly (eds.).
<br />1992. Limnology and Aquatic Biology of the
<br />Southwest, Proceedings of a Special Symposium to
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