Government Printing Office1921Illegitimacy as a child-welfare problem
pt. 2 , Dependent, defective, and delinquent classes series
no. 10 , Bureau publication / U.S. Department of Labor, Children's Bureau
no. 75
Government Printing Office1920Illegitimacy as a child-welfare problem
pt. 1 , Dependent, defective, and delinquent classes series
no. 9 , Bureau publication / U.S. Department of Labor, Children's Bureau
no. 66
