Tekhnicheskii︠a︡t progres i uskori︠a︡vaneto na tempovete na razvitie na promishlenostta v NRB
By: Vl.Vakanov, M.Mikhnev
Publisher: Bŭlgarska komunisticheska parptii︠a︡
Published: 1961
Place of publication: Sofii︠a︡
Language: bul
Number of pages: 259
Subjects: Technological innovations; Industries