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• VIII. REFERENCES <br />Fischer, Demiis \V., 1981, Paleontological Inventory and Assessment ofthe Durango and Cortez <br />Known Recoverable Coal Resource Areas: BLM Contract, 63 pages. <br />Zapp, A. D., 1949, Geology acid Coal Resources of the Durango Area , L a P 1 a t a a n d <br />Montezuma Counties, Colorado: U. S. Geological Survey Oil and Gas Investigations <br />Preliminary Map 109, 2 Sheets. <br />rJ <br />. IS <br />