1. Base-flow investigation on the Sacramento River, September 25, 1985, near Sunspot, Otero County, New Mexico [microform] Yale Public content 1990. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey : [Books and Open-File Reports Section, distributor]. English. Public. New Mexico and Otero County.