TY - RPRT TI - Geologic map of the Denver 1 degree by 2 degrees Quadrangle, north-central Colorado AU - Bruce Bryant AU - L.W. McGrew AU - R. A. Wobus PY - 1981 DO - 10.3133/i1163 UR - https://pubs.usgs.gov/publication/i1163 ID - i1163 ER -