TY - MAP ID - 137547621 TI - Maps showing locations of sampling sites North, South, and West of the Denver, Colorado, area AU - Owen, Douglass E. AU - Otton, James K. AU - Hills, Francis Allan AU - Schumann, R. Randall PY - 1992 PB - Washington (D.C.) U.S. Geological Survey DB - UniCat UR - https://www.unicat.be/uniCat?func=search&query=sysid:137547621 AB - ER -