Correspondence
Obtaining collagen
Typewritten letter, 2 pages
Handwritten letter, 1 page
Handwritten letter, 1 page
Private letter.
Private letter. Mainly on her family.
Private letter.
A postcard, expressing Delbrueck's joy at meeting Hamburger
Interest in hosting Holtfreter
Offers Hamburger a visiting professorship at Columbia University
Max Delbrueck writes to let Hamburger know that he is reading Aristotle night and day, and expressing interest in Hamburger's Spemann paper
Letter about trip to Cambridge