TY - MAP ID - 138293286 TI - Geologic map of the Northgate district, Colorado and Wyoming AU - Steven, Thomas A. AU - Johnson, R.B. AU - Bush, A.L. AU - Weir, Gordon W. PY - 1957 PB - Washington (D.C.) U.S. Geological Survey DB - UniCat UR - https://www.unicat.be/uniCat?func=search&query=sysid:138293286 AB - ER -