TY  - RPRT
TI  - Photogeologic map, Elk Ridge-7 quadrangle, San Juan County, Utah
AU  - Robert J. Hackman
PY  - 1955
DO  - 10.3133/ofr5555
UR  - https://pubs.usgs.gov/publication/ofr5555
ID  - ofr5555
ER  -