A study of 751 boys
by Alida C. Bowler and Ruth S. Bloodgood
(Bureau publication / U.S. Department of Labor, Children's Bureau, no. 230 . Institutional treatment of delinquent boys ; pt. 2)
U.S. Govt. Print. Off., 1936
記述は遡及データによる
U.S. Department of Labor, Children's Bureau
Government Printing Office