[STUDIES ON THE FREQUENCY OF STERILITY IN BULGARIA].
D001699:Biometry; D002031:Bulgaria; D005260:Female; D006801:Humans; D007246:Infertility; D007247:Infertility, Female; D013223:Statistics as Topic
BULGARIA; STATISTICS; STERILITY, FEMALE
PROUCHVANIIA VURKHU CHESTOTATA NA STERILITETA U NAS.