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thank you for meeting and for visiting Ray Wattersen while sick in Iowa ~1983/84
On becoming Tracy H. Harris Professor of Zoology in 1964. On Holtfreter's paper dedicated to Hamburger's 65th birthday. On a conference on "Epithelial-mesenychmal interactions". On Rolf and Eveline Lehmann from Freiburg visiting Holtfreter's lab.
On Hiroko Holtfreter's upcoming PNAS publication. On Lovtrop's recent research & publications on birth defects.
On culture media for studying differentiation of the organizer. On the natics of frogs, mice and monkeys.
On the opening of Hamburger's new lab facilities. On Hamburger's upcoming talk at Rochester on "Embryonic beginnings of behaviour".
Photocopy of handwritten letter, 2 pages
Letter about visiting St. Louis and his move to Buffalo
Letter about experiences during World War II
Letter from Germany after World War II as part of the army of occupation
Handwritten letter, 1 page
Typewritten letter, 2 pages
Handwritten letter, 4 pages