TY  - BOOK
ED  - Coal Mines Committee
ED  - International Labour Organization (Geneva),
ED  - International Labour Organization (Geneva) .
TI  - Hours of work in coal mines: report iv : fouth item on the agenda 
U1  - 331.76223 
PY  - 1949///
CY  - Geneva
PB  - International Labour Office
KW  - Coal mines and mining
KW  - Coal miners
KW  - Hours of labor
N1  - At head of title : Report 4. International Labour Organisation. Coal Mines Committee, 3d sess., Pittsburg, Apr. 1949
ER  -