1. Cesarean section: a contemporary assessment;Evrard;J. reproduct. Med.,1980
2. Changing indications for cesarean section;Haddad;Obstet. Gynec.,1978
3. Changing trends in cesarean section;Hibbard;Am. J. Obstet. Gynec.,1976
4. Do the poor get sterilized—access to services in Campinas, Brazil;Janowitz,1980