by LAZAROV, NIKOLAJ D, ARSOV, EMIL S, ZHEKOV, KRASIMIR ZH, RASHEV, TSOLO V, PENOV, GEORGI D, STANOEV, MARIN S, POPOV, IVAJLO D
Year of Publication 15.11.1990

by DIMITROVA, MARIJA A, ARSOV, EMIL S, KOLEVA, SVETLA P, SABEV, SABI S, RASHEVA, IVANKA A, RASHEV, TSOLO V, SKRYNCHENKO, JURIJ M, PARSHOROV, IVAN M, KOSEV, DANAIL K, POLITAEV, JURIJ M
Year of Publication 15.05.1991

by LAZAROV, NIKOLAJ D, ARSOV, EMIL S, ZHEKOV, KRASIMIR ZH, VUCHKOV, ALEKSANDAR K, RASHEV, TSOLO V, PENOV, GEORGI D, GOTSEV, VESKO KH, POPOV, IVAJLO D, BOGEV, PAVEL V
Year of Publication 15.05.1990

by ARSOV, EMIL S, LAZAROV, NIKOLAJ D, ZHEKOV, KRASIMIR ZH, VUCHKOV, ALEKSANDAR K, RASHEV, TSOLO V, PENOV, GEORGI D, GOTSEV, VESKO KH, POPOV, IVAJLO D, BOGEV, PAVEL V
Year of Publication 15.05.1990

by ARSOV,EMIL S.,BG, BOGEV,PAVEL V.,BG, GRIGOROVA,NADEZHDA G.,BG, PESHEV,VALENTIN K.,BG, MALCHEVA,IRENA B.,BG
Year of Publication 15.11.1988

by ZHEKOV,KRASIMIR ZH, LAZAROV,NIKOLAJJ D, GOCEV,VESKO KH, TAKEV,ASPARUKH S, ANEV,MILCHO S, BOGEV,PAVEL V, VUCHKOV,ALEKSANDR K, ARSOV,EMIL S, PETKOV,DIMITR P
Year of Publication 15.10.1986

by ARSOV,EMIL S.,BG, GOCEV,VESKO KH.,BG, STANCHEVA,VALENTINA R.,BG, VUCHKOV,ALEKSAND'R K.,BG, PETKOV,DIMIT'R P.,BG, LAZAROV,NIKOLAJJ D.,BG, POPOV,IVAJJLO D.,BG
Year of Publication 15.02.1989