Excerpt from Carcinogenesis Abstracts, Vol. 11: A Monthly Publication of the National Cancer Institute; July 1972-January 1973 This change is being made so that the date of publication of material included in each issue corres ponds to the issue date. This journal is available free of charge to libraries and to individuals who have a professional interest in carcinogenesis. Requests for Carcinogenesis Abstracts from qualified individuals should include statements of their rela tionship to carcinogenesis research. All correspondence should be addressed as follows. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.

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