References Cited
Friedlander, H. 1995. The Origins of Nazi Genocide: From Euthanasia to the Final Solution. Chapel Hill: University of North Carolina Press.
Katz, A. 1958. An Investigation of Self-Organized Groups of Parents and Relatives in the Fields of Physical and Mental Handicap. Unpublished Doctoral Dissertation, New York School of Social Work.
Lerner, H.J. 1972. State Association for Retarded Children and New York State Government, 1948-1968. Printed in Israel: Yessod Publishing Ltd.
Pernick, M.S. 1996. The Black Stork: Eugenics and the Death of “Defective” Babies in American Medicine and Motion Pictures Since 1915. Oxford: Oxford University Press.
Trent, J.W. 1994. Inventing the Feeble-Minded: A History of Mental Retardation in the United States. Berkeley and Los Angeles: University of California Press.
Wolfensberger, W. 1972. The Principle of Normalization in Human Services. National Institute on Mental Retardation: Toronto, Canada.
Wolfensberger, W. 1981. The Extermination of Handicapped People in World War II Germany. Mental Retardation, (19) No.1: 1-7.