दस्तावेज़
Letters Received to Mr. Barker [H.H. Barker], November , 1928
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Extracted text
OCR Page 1 of 5Columbia University
College of and
EPIDEMIOLOGY
437 WEST 59TH STREET, NEW YORK
INDUSTRIAL HYGIENE
PUBLIC HEALTH ADMINISTRATION
INSTITUTE OF PUBLIC HEALTH
SANITARY SCIENCE
Dear am. Barlan:
Please believe this may of sending
you the data but & mar held mp until in
u' lo-ch by conference.
your tanly
Tuden ih B. Thin
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