Author
Bandov, Kiril Ĭ
3
Vissh minno-geolozhki institut
3
Bulgaria. Komitet po geologii︠a︡
2
Bŭlgarska akademii︠a︡ na naukite
2
Bŭlgarska akademii︠a︡ na naukite. Otdelenie za geologicheski i geografski nauki
2
Geologicheski institut (Bŭlgarska akademii︠a︡ na naukite)
2
Sofiĭski universitet
2
Beregov, Rostislav S.
1
Bulgaria. Glavno upravlenie po geologii︠a︡
1
Bulgaria. Ministerstvo na tezhkata promishlenost
1
Bŭlgarska akademii︠a︡ na naukite. Otdelenie za geologicheski, geografski i khimicheski nauki
1
Bŭlgarska akademii︠a︡ na naukite. Otdelenie za geologo-geografski i khimicheski nauki
1
Bŭlgarska akademi︠i︡a na naukite
1
Bŭlgarsko geologichesko druzhestvo
1
Geologicheski institut "Strashimir Dimitrov."
1
Geologicheski institut (Sofia, Bulgaria)
1
Kamenov, Bo︠i︡an G.
1
Koen, El. Raf
1
Landzhev, Ivan N.
1
Minno-geolozhki institut (Sofia, Bulgaria)
1
Minno-geolozhki universitet (Sofia, Bulgaria)
1
Nauchna konferen︠t︡si︠i︡a po minno delo i geologi︠i︡a "25 godini Vissh minno-geolozhki institut" Varna, Bulgaria
1
Scientific Conference with International Participation "Technical Progress in Mining and Geology" Varna, Bulgaria
1
Shishmanov, Chilo Todorov, 1918-
1
Sofiĭski universitet "Kliment Okhridski." Geologo-geografski fakultet
1
Sofiĭski universitet "Sv. Kliment Okhridski." Geologo-geografski fakultet
1
Sofiĭski universitet. Biologo-geologo-geografski fakultet
1
Sofiĭski universitet. Geologo-geografski fakultet
1