I 5 December 1962 Mr.

(isso) HUMBLE SO U TH EAST ESSO REGION W ILLIAM B.

ETHYL CORPORATION lOO PARK AVENUE BUILDING AT 41st STREET NEWYORK 17, X.

Dear Bob: \ >i iS)i V S5V I appreciate the copies of the letter for the record.

September 12, 1962 Helen L.

GOVERNM ENT OF WESTERN AUSTRALIA DEPARTM ENT OF PUBLIC HEALTH 57 M URRAY STREET PERTH In replying please quote DDL/CT LETTERS: BOX 134.

THE SCHOOL OF M EDICINE DEPARTMENT O F ANATOMY THE U N IV E R S IT Y OF N ORTH AT CHAPEL HILL 27515 CAROLINA January 22,1965 Dr.

July 11, 1969 Mr.

C A L I F O R N I A I N ST I T U T E OF T E C H N O L O G Y PASADENA, CALIFORNIA 91109 GEOLOGICAL SCIENCES June 1A , 1965 Professor R.

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ON HYGIENE - LEAD ALKYLS AREA September 15, 1966 1.

April 10, 1967 Mr.

June 6, 1960 Mr.

THE ASSOCIATED OCTEL COMPANY LIMITED MEDICAL SERVICES E L L E S M E R E PORT, C H E S H I R E Head O f f ic e : 2 0 Berk eley Square, London, W.

S t a n d a r d -Va c u u m O i l C o m p a n y lOOO We s t c h e s t e r Av e n u e Wh i t e P l a i n s , Ne w Yo r k RO CKW ELL 1 - 1 0 0 0 M ay 9, 1960 D r .