bvhh/ahv Hie Government Chemist, Hie Government Laboratory, Cornwall House, Stanford Street, LONDON, S.E.l. 20th February, 1967 Dear Sir, We are currently Interested in organochlorine residues in animals and birds, and have noted a reference to the work of Simmons and Tatton of your laboratory, Hiey are stated to have examined human gall stonea and found euoh residues in 26 patients from two hospitals.

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MCS 225 Preliminary Technical Data Sheet August 30, 1963 DEVELOPMENT DEPARTMENT MONSANTO CHEMICAL COMPANY ORGANIC CHEMICALS DIVISION ST.

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