Title: Uslovii︠a︡ zhizni i zdorovʹe naselenii︠a︡ /
Authors: T͡Saregorodt͡sev, G. I.; Apostolov, Evgeni.
Publisher: Medit︠s︡ina,
Year: 1975
Subjects: Public health; Public health Soviet Union; Public health Bulgaria; Health surveys.