Selected characteristies of occupations (physical demands, working c onditions training time) :    a supplement to the dictionary of occupat ional titles /  
U.S.department of labor 
 - 3rd ed. 
 - Madison :    School for workers ,    1966 
 - xii,280 p. ;    29 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Encyclopedias and dictionaries.
<br/><br/><label>Dewey Class. No.: </label>REF 413 SEL