TY  - RPRT
TI  - Geologic map of the Boulder quadrangle, Boulder County, Colorado
AU  - Chester T. Wrucke
AU  - Richard F. Wilson
PY  - 1967
DO  - 10.3133/ofr67281
UR  - https://pubs.usgs.gov/publication/ofr67281
ID  - ofr67281
ER  -