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Presented at the 37th Annual Meeting of the American Association for Cancer Research at Atlantic City, New Jersey, March 11, 1946.

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First page of Observations on the Carcinogenicity of 1,2,3,4-Dibenzophenanthrene and Its 9-Methyl and 10-Methyl Derivatives<xref rid="FN1" ref-type="fn"><sup>*</sup></xref>