TY  - RPRT
TI  - Geologic map of the Purgatory Canyon quadrangle, northern Mohave County, Arizona
AU  - George H. Billingsley
PY  - 1990
DO  - 10.3133/ofr90540
UR  - https://pubs.usgs.gov/publication/ofr90540
ID  - ofr90540
ER  -