Table of Contens.- Structure and Assembly of Alphaviruses.- Fine Specificity of Auto- and Alloreactive Cytotoxic T-Lymphocytes: Heteroclitic Cross-reactions Between Mutant and Original H-2 Antigens.- Plant Cell Cultures and Protoplasts in Plant Virus Research.- The Structure and Replication of Coronaviruses.- The Biology and Pathogenesis of Coronaviruses.- Indexed in Current Contens.