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For your information, i am enclosing the following:

1. A copy of a paper entitled "Use of a Benzimidazole Derivative with Potent Morphine-Like Properties Orally as a Presumptive Reinforcer in Conditioning of Drug-Seeking Behavior in Rats" by Abraham Wikler, Phillip C. Green, Herbert D. Smith and Frank T. Pescor, which will be presented at the meeting of the Committee on Drug Addiction and Narcotics, National Research Council, National Academy of Science, in Philadeliphia 11-12 January 1960, and included in the "Not for Publication" section of the minutes of the proceedings; and

2. A copy of an abstract of the paper, for publication in . Federation Proceedings (March, 1960) and presentation at the , meeting of the Federation of American Societies for Experimental Biology in Chicago, 11-15 April 1960.

With best personal regards and all good wishes for the New Year,

Sincerely,

Aurihts

Abraham Wikler, M.D.
Acting Director.

AW:tkh Enclosures

DEPARTMENT OF HEALTH, EDUCATION, AND WELFARE

Natleaal Instituie of Meptal Health Addictlsa Researth Ctater U.5. Puble Kealth Sarrice Hospital Lexiagteo, Keatocxr

PUBLIC HEALTH SERVICE 24 December 1959