TY  - BOOK
AU  - Ogburn, William Fielding.
TI  - Progress and uniformity in child-labor legislation: a study in statistical measurement 
AV  - HD6243.U5 O6
U1  - 331.026 
PY  - 1912///
CY  - New York
PB  - Collumbia University
KW  - Child labor
KW  - United States
KW  - Labor laws and legislation
ER  -