Government Printing Office1917Miscellaneous series / U.S. Department of Labor, Children's Bureau
no. 10 , Bureau publication / U.S. Department of Labor, Children's Bureau
no. 27
Government Printing Office1915Miscellaneous series / U.S. Department of Labor, Children's Bureau
no. 4 , Bureau publication / U.S. Department of Labor, Children's Bureau
no. 14