Jamary 5, 1952

ur. Robert DeMars

Bac tericlogy
University of Dlinois
Urbana, Iliinois

Dear Mr, Deldars:

I am sorry that I may have to disappoint you for most of the request
for repgrints just received. My supply of the Cell Genetics... was very
limited; additional coplea san be purchased from the publisher. I am also
out of the Salmonella paper; perhaps you can talk Zinder out of a copy if
he has any left. I will save Sex Compatibility... for Streisinger and your-
self—— they haven't come in yet— and will be pleased to initiate exchange.

Sincerely,

J.shua Lederberg