//-->
Invalidität - Arbeitsverwendungsfähigkeit
Hülsmann, Paul, (1954)
Proceedings of the National Conference on Workmen's Compensation and Rehabilitation
(1950)
Disability pensions : this survey of disability pensions in the U.S. covers their ups and downs from the twenties to the present ; their incidente today, how pensions are computed, and eligibility requirements are all covered
Fox, Harland, (1956)