12M-9-44

THE HOSPITAL OF THE ROCKEFELLER INSTITUTE
FOR MEDICAL RESEARCH
66TH STREET AND YORK AVENUE, NEW YORK 21, N. Y.

Merch 6, 1947

tir, Josnun Lecerberg
Usborn Botuniesl Lehore tory
Le iniversity

Hew Hiven, Connecticut

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Maclyn McCarty, A.D.

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