1. Employment in manufacturing, 1982 : distribution by county Author/Creator: United States. Bureau of the Census. Geography Division Publication/Creation: [Washington, D.C.?] : Geography Division, [1985?] Resource Type: Map Access & Availability: Loading
2. Employment in manufacturing by counties of the United States, 1960 Author/Creator: United States. Bureau of the Census Publication/Creation: Washington, D.C. : U.S. G.P.O., 1966 Resource Type: Map Access & Availability: Loading
3. Employment in professional, technical, and kindred occupations by counties in the United States, 1960 Author/Creator: United States. Bureau of the Census Publication/Creation: Washington, D.C. : U.S. Dept. of Commerce, Bureau of the Census, [1966] Resource Type: Map Access & Availability: Loading