Front Cover; Advances in Cancer Research, Volume 32; Copyright Page; CONTENTS; Contributors to Volume 32; Chapter 1. Tumor Promoters and the Mechanism of Tumor Promotion; Chapter 2. Shedding from the Cell Surface of Normal and Cancer Cells; Chapter 3. Tumor Antigens on Neoplasms Induced by Chemical Carcinogens and by DNA- and RNA-Containing Viruses: Properties of the Solubilized Antigens; Chapter 4. Nutrition and Its Relationship to Cancer; Subject Index; Content of Previous Volumes.