TY  - RPRT
TI  - Preliminary geologic map of the Erie quadrangle, Boulder, Weld, and Adams counties, Colorado
AU  - R. B. Colton
AU  - L. W. Anderson
PY  - 1977
DO  - 10.3133/mf882
UR  - https://pubs.usgs.gov/publication/mf882
ID  - mf882
ER  -