Hours of labour in industry /
- Geneva : International labor office 1922.
- 40 p. 22 cm.
- Studes and reports series D (Wages and hours) No. 7. .
Grat Britain.
l 25000073
Hours of labor--United States.
HD4813 / .I4 ser. D, no. 14
331.2 / INH
Grat Britain.
l 25000073
Hours of labor--United States.
HD4813 / .I4 ser. D, no. 14
331.2 / INH