ADVANCES IN TUMOUR PREVENTION DETECTION AND CHARACTERIZATION vol.4. 533,035 CHARACTERIZATION Characterization and treatment of human tumours. Proceedings of the Seventh International Syposium on the Biological Characterization of Human Tumours. Budapest, April 13-15, 1977. Ed. W. Davis, K. R. Harrap. Amsterdam 1978 Excerpta Medica 8° s. nlb. 12, 332, il. Advances in Tumour Prevention Detection and Characterization vol. 4. Excerpta Medica. International Congress Ser. 420