1．New Structures in Viral RNA：Noncovalent Circles and Covalently-Linked Protein＆David Baltimore，Ralf F．Pettersson，James B．Flanegan，Martinez J．Hewlett，John K．Rose，and Victor Ambros 1
2．Evolution of F1 Phage＆Norton D．Zinder 13
3．Murine Mammary Tumor Virus and the Regulation of Eucaryotic Gene Transcription＆Wade P．Parks 21
4．Receptor for the Group B Coxsackieviruses：Characterization and Extraction from HeLa Cell Plasma Membranes＆R．L．Crowell and J-S．Siak 39
5．Influenza Virus Genes：Characterization and Biologic Activity＆Peter Palese，Jerome L．Schulman，and Mary B．Ritchey 57
6．Cell-Mediated Immunity in Virus Infections：Influenza Virus and the Problem of Self-Non-Self Discrimination＆Peter C．Doherty，Rita B．Effros，and Jack Bennink 73
7．Papilloma Viruses and Squamous Cell Carcinomas in Man＆Harold zur Hausen，Lutz Gissmann，Herbert Pfister，Wolfgang Steiner，and Shadrak Ojwang 93
8．Studies on In Vitro Production of Hepatitis B Surface Antigen by a Human Hepatoma Cell Line＆Jennifer Alexander，Given Macnab，and Rachel Saunders 103
9．Reovirus-Like Agents(Rotaviruses)Associated with Diarrheal Illness in Animals and Man＆Richard G．Wyatt，Anthony R．Kalica，Charles A．Mebus，Hyan W．Kim，William T．London，Robert M．Chanock，and Albert Z．Kapikian 121
10．An Experimental Protein Vaccine for Foot-and-Mouth Disease＆Howard L．Bachrach，Douglas M．Moore，Peter D．McKercher，and Jerome Polatnick 147