Zookhigienni problemi na promishlenoto zhivotnovŭdstvo v Narodna Republika Bŭlgarii͡a︡
By: Georgi Petkov, Baĭko Baĭkov, Nikola Belev.
Publisher: Ministerstvo na zemedelieto i khranitelnata promishlenost, Otdel "Propaganda"
Published: 1976
Place of publication: Sofii͡a︡
Language: bul
Number of pages: 23