TY  - RPRT
TI  - Aeromagnetic maps of the Twin Buttes area, Pima and Santa Cruz Counties, Arizona, flown at 500 feet above ground and flown at 4,000 feet barometric elevation
AU  - Gordon E. Andreasen
AU  - James A. Pitkin
PY  - 1962
DO  - 10.3133/ofr624
UR  - https://pubs.usgs.gov/publication/ofr624
ID  - ofr624
ER  -