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Titles
- Laws pertaining to duties of county and city health officers: compiled from Revised civil statutes of Texas (1925)1
- Lead poison and you: valuable information on physical, medical and insurance angles which all craftsmen should know1
- Letter from Alexander Makinsky to Alan Gregg1
- Letter from Allen O. Whipple to Virginia Apgar1
- Letter from Charles A. Doan to Florence R. Sabin1
- Letter from Charles D. Hurd, Northwestern University to Michael Heidelberger1
- Letter from Charles R. Drew to Lenore (Robbins) Drew3
- Letter from Courtenay Crocker to Wilbur A. Sawyer1
- Letter from Fred L. Soper to Lewis Hackett1
- Letter from Fred L. Soper to Wilbur A. Sawyer1
- Letter from Hugh S. Taylor, Princeton University to Michael Heidelberger1
- Letter from Kai O. Pedersen to Michael Heidelberger1
- Letter from Karl A. Connell to Virginia Apgar2
- Letter from Lewis Hackett to Fred L. Soper1
- Letter from Linus Pauling to Warren Weaver3
- Letter from Michael Heidelberger to Charles D. Hurd, Northwestern University1
- Letter from Michael Heidelberger to E. J. Crane, Chemical Abstracts1
- Letter from Michael Heidelberger to Hugh S. Taylor, Princeton University2
- Letter from Percival Hartley, Medical Research Council of Great Britain to Michael Heidelberger1
- Letter from Ralph M. Waters to Virginia Apgar1