February 22, 1963 J.

January 13, 1964 Mr.

May 20, 1968 M.

December 6, 1966 Umberto Saffiotti, M.D.

P R O G R ESS R E P O R T - P R O JE C T NO .

May 31, 1961 B.

MINNESOTA MINING AND MANUFACTURINB COMPANY GENERAL.

LONDON SCHOOL OF HYGIENE AND TROPICAL MEDICINE INCORPORATING THE ROSS INSTITUTE (UNIVERSITY OFLONDON) Cables : Hygower London W .C .l KEPPEL STREET, (GOWER STREET), LONDON, W.C.I.

F e b r u a r y 22, 1962 M em o to: Dr.

O X F O R D 7-5280 GO RD O N - EV A N S S A L ES CO. , I NC. 60 EAST 42ND STREET NEW YORK, N.

September 21, 1964 Walter B.

DEPARTMENT OF HEALTH, EDUCATION, AND WELFARE PUBLIC HEALTH SERVICE NATIO NAL i n s t i t u t e s o f h e a l t h BETHESDA.

ETHYL HELLAS CHEMICAL COMPANY S.A.

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A \) MARWAIS STEEL COMPANY 6 4 6 6 Gayh ar t St r e e t Los Angel es, Cal i f o r ni a 9 0 0 2 2 723- S131 7,23 --S31 Cab l e Ad d r ess: Wai sm ar September 21 1964 University of Cincinnati Medical School Cincinnati, Ohio 'y RMS------ - FlLE-,,-- .