Basmadzhieva K, Nikiforov B, Tabakova S, Balabaeva L, Davidkova E
Probl Khig. 1983;8:109-15.
Population morbidity rate was studied in some regions of chemical industry, petro-chemical and metallurgical industry as well as in some big towns of the country according to the data on the appeals for medical aid for a 7-year long period (1972-1978). A correlation was established between the type and degree of atmospheric pollution in the polluted regions and morbidity rate, according to nozological entities, both among infant and adult population.