1. 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
2. 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