Falk, I. S.  1899-1984 <br/><br/>
Disability among gainfully occupied persons;  an introduction to disability insurance statistics 
[by] I. S. Falk, Barkev S. Sanders and David Federman ... 
 - Washington, D.C.,  Federal security agency, Social security board, Bureau of research and statistics,  1945. 
 - iv, 60 p.  ill. 
<br/><br/>"List of references": p. 58-60. 
<br/><br/><label>LCCN: </label>ss 45000017  
<br/><br/><label>LC Class. No.: </label>HD7123  / .A35 no. 61 
<br/><br/><label>National Library of Medicine Call No.: </label>W6  / P3 v.5789