World Health Organization <br/><br/>
Aging and working capacity  report of a WHO study group 
World Health Organization. 
 - Geneva  World Health Organization  1993 
 - vi, 49p., 23cm 
<br/><br/><label>ISBN: </label>92 - 4 - 120835 - x. 
<br/><br/><label>Dewey Class. No.: </label>613.0438  / W83A