[On the incidence of involuntary sterility in women in the town of Rus and its surroundings].
D002031:Bulgaria; D005260:Female; D006801:Humans; D007247:Infertility, Female / Q000453:epidemiology*; D011247:Pregnancy
Vurkhu chestotata na nevolniia sterilitet u zhenite ot grad ruse i rusenski okrug.