Historical map, hydrologic map (gel-lithograph, color); 10 3/8 x 14 15/16 inches; Inscribed (pencil): Incl 1.1950-07-01unknownhttp://rightsstatements.org/vocab/NKC/1.0/enghttp://congressarchives.org/record/CAC_CC_047_5_0000_1_0009Item is a boundary map of the Arkansas-White-Red Basins featuring Corps of Engineers district boundaries and district offices.