Hamburger, Viktor
a letter and its translation in which Hans Spemann dicusses his published works, congratulates his correspondant on his work keeping frog embryos alive, and mentions salamander embryo work
a letter and its translation in which Hans Spemann dicusses their personal lives, his work, his book, and Holtfreter
Handwritten, Typewritten
Typewritten
Handwritten
Typewritten
Typewritten
Abstract on the nerve cells in chick embryo spinal cords, by Robert Paul Skoff
Typewritten
Handwritten
Handwritten
Typewritten