TY  - RPRT
TI  - Proterozoic geology of the western and southeastern Needle Mountains, Colorado; field trip guidebook
AU  - David A. Gonzales
AU  - C. M. Conway
AU  - J. A. Ellingson
AU  - J. A. Campbell
PY  - 1994
DO  - 10.3133/ofr94437
UR  - https://pubs.usgs.gov/publication/ofr94437
ID  - ofr94437
ER  -