Year book of labour statistics =  anuario de estadisticas del trabajo = annuaire des statistiques du travail / 
International Labour Office. 
 - 29th ed. 
 - Geneva:   International Labour Office,   [1970].  
 - xxiii, 815 p. ;  31 cm. 
 - 1st year of issue (1935-36)- 
<br/><br/><label>Subjects--Corporate Names: </label><br/>International Labour Office
<br/><br/><label>Subjects--Topical Terms: </label><br/>Labor--Statistics
<br/><br/><label>Dewey Class. No.: </label>331