1970 census of population.

Washington, D.C. : U.S. Dept. of Commerce, Social and Economic Statistics Administration, Bureau of the Census : For sale by the Supt. of Docs., U.S. G.P.O., 1973

Age at first marriage.

[Washington], [For sale by the Supt. of Docs., U.S. Govt. Print. Off.] 1973

Marital status and living arrangements of the population in the United States, 1970.

Washington, D.C. : U.S. Dept. of Commerce, Social and Economic Statistics Administration, Bureau of the Census, 1973

Age at first marriage and children ever born for the United States, 1970.

Washington, D.C. : U.S. Dept. of Commerce, Social and Economic Statistics Administration, Bureau of the Census, 1973

Social and economic characteristics by marital status for the United States, 1970.

Washington, D.C. : U.S. Dept. of Commerce, Social and Economic Statistics Administration, Bureau of the Census, 1973