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On his upcoming lecture series at Columbia. On getting the permission for visiting the US.
On teaching undergraduates. On prospective successors of Curt Stern.
Invitation as a guest lecturer at Hamburger's department at University of Washington.
On the death of Spemann.
About Coghill's "apprentice"
Handwritten letter, 2 pages
Handwritten letter, 2 pages
Typewritten letter, 5 pages
Typewritten letter, 1 page
Letter turning down Hamburger's offer of a set of books
Report about the reviews about Hamburger's new book. Mentioned Marine Biological Laboratory summer course.
About a National Institutes of Health rejection letter