TY  - RPRT
TI  - Geologic map of the Grayback quadrangle, Pinal County, Arizona
AU  - Henry Rowland Cornwall
AU  - Medora Louise Hooper Krieger
PY  - 1975
DO  - 10.3133/gq1206
UR  - https://pubs.usgs.gov/publication/gq1206
ID  - gq1206
ER  -