Correspondence
On preparing lectures in invertebrate zoology and introductory botany.
On his travel to Japan. On his work with the non-cellulated slime mold Physarum.
Typewritten letter, 1 page
On his recent trip to Europe. On Mario Sala from Padua and his research.
Typewritten letter, 2 pages, Hamburger CC'd
Now at University of Minnesota. Still like to visit Hamburger
Letter about visit
Request to work with Hamburger. List of publications. Research plans
Thank you letter by Elisabeth & Heinrich Meyn for a record sent by Hamburger
Season's greetings
Private letter
Greetings for Hamburger's 75th birthday by Heinrich & Elisabeth Meyn