Speakman, D <br/><br/>
Bibliography of research on changes in working capacity with age 

 -  Ministry of Labour and National Service,   1956 
 - iii, 50p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Bibliography
<br/><br/><label>Subjects--Index Terms: </label>Research 
<br/><br/><label>Universal Decimal Class. No.: </label>R 016:331(04)  / J6