Formirane na inzhenernata obshtnost v Bŭlgarii︠a︡, 1878 g. - 1944 g.
Subtitle: postroi︠a︡vane na vodoprovod "Rila -- Sofii︠a︡"
By: Dii︠a︡na Mitkova Petrushkova.
Publisher: IK "Nike - NT - 89
Published: 2004
Place of publication: Sofii︠a︡
Language: bul
Number of pages: 248