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Jane Maienschein to Viktor Hamburger, February 5, 1986
Letter
Jane Maienschein to Viktor Hamburger, July 29, 1988
Letter
Konrad Lorenz to Viktor Hamburger, July 11, 1966
Letter
Peter Marler to Viktor Hamburger, December 6, 1968
Letter
Martinovitch to Viktor Hamburger, August 9, 1956
Letter
Margaret Murray to Viktor Hamburger, January 1, 1968
Letter
Konrad Lorenz to Viktor Hamburger, April 25, 1966
Letter
Jane Maienschein to Viktor Hamburger, March 30, 1997
Letter
Konrad Lorenz to Viktor Hamburger, July 15. 1966
Letter
Jane Maienschein to Viktor Hamburger, August 20, 1966
Letter
Konrad Lorenz to Viktor Hamburger, November 21, 1966
Letter
Jane Maienschein to Viktor Hamburger, April 21, 1995
Letter

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