TY  - RPRT
TI  - Aeromagnetic map of the Twin Buttes area, Pima and Santa Cruz Counties, Arizona
AU  - G. E. Andreasen
AU  - J. A. Pitkin
PY  - 1963
DO  - 10.3133/gp426
UR  - https://pubs.usgs.gov/publication/gp426
ID  - gp426
ER  -