Coal Producing and Market Area, State of Oklahoma1939-1947unknownhttp://rightsstatements.org/vocab/NKC/1.0/enghttp://congressarchives.org/record/CAC_CC_031_14_0000_7_221The document represents a plan item is a pictorial map of Oklahoma, Kansas, Nebraska, South Dakota, Arkansas, Missouri, and Iowa featuring the locations of steam electric plants, slab zinc smelting, coal, and carbide production. Pictorial map (regional; diazotype, blueline print); 17 3/8 x 14 3/4 inches.