Author
Bulgaria. Ministerstvo na tezhkata promishlenost
2
Bandov, Kiril Ĭ
1
Bulgaria. Glavno upravlenie po geologii︠a︡
1
Bulgaria. Komitet po geologii︠a︡
1
Bŭlgarska akademii︠a︡ na naukite
1
Bŭlgarska akademi︠i︡a na naukite
1
DSO "︠T︡Svetna metalurgi︠i︡a" (Bulgaria)
1
Geologicheski institut (Bŭlgarska akademii︠a︡ na naukite)
1
NIPRORUDA (Bulgaria)
1
Scientific Conference with International Participation "Intensification, Complexity and Efficiency of Prospecting and Exploitation of Mineral Raw Materials" Sofia, Bulgaria
1
Vissh minno-geolozhki institut
1