TY  - RPRT
TI  - Reconnaissance geologic map of parts of the Twin Peaks and Blanca Peak quadrangles, Alamosa, Costilla, and Huerfano counties, Colorado
AU  - B. R. Johnson
AU  - R.M. Bruce
PY  - 1991
DO  - 10.3133/mf2169
UR  - https://pubs.usgs.gov/publication/mf2169
ID  - mf2169
ER  -