[Reliability of the Czechoslovak contraceptive devices].
D003270:Contraceptive Agents; D003273:Contraceptive Devices; D003276:Contraceptives, Oral; D003604:Czechoslovakia; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D007434:Intrauterine Devices; D011247:Pregnancy
D003270:Contraceptive Agents; D003276:Contraceptives, Oral
Spol'ahlivost' ceskoslovenských antikoncepcných prostriedkov.