Geological Survey (U.S.)Super XX; By USGS (GS-VADR-4-103,104); Scale 1:31,400JPEGoai:digital.library.illinois.edu:ede27ab0-8a10-0137-6d99-02d0d7bfd6e4-b507engPublicStereogram No. 507 - Spotted ValleyImageryColorado--Alamosa CountyColorado1960-11-12University of Illinois Urbana-Champaign