Fischer, Gretl Kraus. “A.M. Klein: Religious Philosophy and Ethics in His Writing.” PhD dissertation, McGill University, 1972. http://digitool.Library.McGill.CA:80/R/-?func=dbin-jump-full&object_id=72440&silo_library=GEN01.

Fischer, Gretl Kraus. In Search of Jerusalem : Religion and Ethics in the Writings of A.M. Klein. Montreal: McGill-Queen’s University Press, 1975.

Fischer, Gretl Kraus. “Religious Philosophy in the Writings of A.M. Klein.” In The A.M. Klein Symposium, 37–45. Ottawa, ON: University of Ottawa Press, 1975.