October 10 1948
Dr. Joshua Lederberg
University of Wisconsin
College of Agriculture
Department of Genetics--
Dear Dr. Lederberg--
I am interested in obtaining reprints of your publications concerning biochemical mutants of E. coli at present, I am trying to gather information about certain of your methods and results as I may be working with some of your cultures in the near future. I shall be working with Dr. Dandoroff[?] here at the University of Cal on problems which may be of interest to you too. At the moment this project is still in its infancy so any help from you will be greatly appreciated.
Sincerely,
Harold P. Klein