Chemical carcinogenesis : selected papers presented at the World Symposium on Model Studies in Chemical Carcinogenesis ... October 31-Novenber 3, 1972 Part A - World Symposium on Model Studies in Chemical Carcinogenesis (1972 Baltimore, Md.); Ts´o, Paul O. P., 1929- (Paul On Pong); DiPaolo, Joseph A. (New York : Marcel Dekker, 1974)