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Johnson, lmss B. 1961. Coal l~sources of the Trinidad Coal Field <br />in Huerfano and Las Animas Counties, Colorado. Geological Survey <br />Bulletin 1112-E. pp 129-180. <br />Harbour, R.L. and G.H. Dixon. 1959. Coal Resources of the Trinidad- <br />~+'lar Area Las Animas and Huerfano Counties, Colorado. Geological <br />Survey Bulletin 1072-G. Plate II. <br /> <br /> <br />IV-12 <br />