1. Aeromagnetic map of the Palo Alto 1:100,000 quadrangle, California [microform] Yale Public content 1993. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey ; Books and Open-File Reports Section, distribution. English. Public. California, Santa Clara County, Santa Cruz County, and San Mateo County.