The year book of obstetrics and gynecology 1972 The year book of obstetrics and gynecology 1971 The year book of obstetrics and gynecology 1973 The year book of obstetrics and gynecology 1977 The year book of obstetrics and gynecology 1979 The year book of obstetrics and gynecology 1982 The year book of obstetrics and gynecology, 1971 The year book of obstetrics and gynecology, 1979 The year book of obstetrics and gynecology, 1982 The year book of obstetrics and gynecology 1980