Differential current fertility in the United States / Lee-Jay Cho, Wilson H. Grabill [and] Donald J. Bogue. With the assistance of: Elizabeth Bogue and Maria Davidson. Cho, Lee-Jay. Grabill, Wilson H. Bogue, Donald Joseph, 1918- Fertility, Human United States. HB915 .C46 612.6 CHD Includes bibliographical references. Chicago : Community and Family Study Center, University of Chicago, c1970 c1970 1970 Text xiv, 426 p. : eng United States Population. United States Statistics, Vital. United States.