Advances in comparative leukemia research, 1981 : proceedings of the Xth International symposium for Comparative Research on Leukemia and Related Diseases, held at the University of California, Los Angeles, U.S.A., August 31-September 4, 1981 - Yohn, David S.; Blakeslee, James R. (Elsevier Biomedical : Elsevier Science Pub. Co., 1982)