Disability among gainfully occupied persons : an introduction to disability insurance statistics

I. S Falk [by] I. S. Falk, Barkev S. Sanders and David Federman ..
Bok · Engelsk · 1945 I. S Falk

Utgitt	Washington, D. C. : Federal security agency, Social security board, Bureau of research and statistics , 1945
Omfang	iv, 60 s. : ill.