TY  - RPRT
TI  - Reconnaissance geologic map of the Colona Quadrangle, Montrose and Ouray counties, Colorado
AU  - W. J. Hail
PY  - 1987
DO  - 10.3133/mf2003
UR  - https://pubs.usgs.gov/publication/mf2003
ID  - mf2003
ER  -