Reconnaissance Map of the Salton Sink, California1921-01-01unknownhttp://rightsstatements.org/vocab/NKC/1.0/enghttp://congressarchives.org/record/CAC_CC_053_4_0000_1_9Reconnaissance Map by the U.S. Geological Survey: This is a reprint featuring handwritten annotations of drops and canals. Dimensions: 16 1/2 x 22.