by STOJANOV,VELICHKO V, EFREMOV,ALEKSANDR V, RJABCHENKO,EVGENIJJ P, MINJAKIN,VLADIMIR M, DASKALOV,PETR G, IVANOV,IVAN P, GEORGIEV,NIKOLAJJ T, KURLENJA,MIKHAIL V
Year of Publication 15.04.1987

by STOJANOV,VELICHKO V, VIKTOROV,TODOR I, BAKALOV,IVAN G, NENOV,JULIAN C, UZUNOV,KRUM L, IVANOV,IVAN P, KUCAROV,BOCHKO K, KAMBERSKI,VASIL S, VAKLEV,IVAN A
Year of Publication 15.03.1985

by PENEV,STOJAN V, STOJANOV,VELICHKO V, VIKTOROV,TODOR I, MARINOV,VALERI M, MAVRODIEVA,RADMILA D, IVANOV,IVAN P, KUCAROV,BOCHKO K, ILIEV,JJORDAN P, GERGINOV,ILIJA S, VLADIMIROV,VLADIMIR M, GEORGIEV,NIKOLAJJ T, SHEKERDZHIEV,VENCESLAV D
Year of Publication 14.08.1987

by STOJANOV,VELICHKO V, STANCHEV,RADKO L, IVANOV,IVAN P
Year of Publication 15.04.1983

by KAMENOV,EMIL B.,BG, MAVRODIEVA,RADMILA D.,BG, KRUMOV,IVAN K.,BG, KAMBERSKI,VASIL S.,BG, VIKTOROV,TODOR I.,BG, IVANOV,IVAN P.,BG, UZUNOV,KRUM L.,BG, KUCAROV,BOCHKO K.,BG, STOJANOV,VELICHKO V.,BG, VAKLEV,IVAN A.,BG, JJORDANOV,GEORGI V.,BG
Year of Publication 15.02.1989

by PENEV,STOJAN V, JJORDANOV,GEORGI V, KOSTOV,GOSHO A, NIKOLOV,NIKOLA G, IVANOV,IVAN P, SLOKOVSKI,VENCESLAV G, DAVIDOV,DAVID G, STOJANOV,VELICHKO V, TONOV,KRASIMIR I, PARASHKEVOV,RADI D, KHRISTOV,VESELIN S, DEDEV,NENO R, VLADIMIROV,VLADIMIR M, KOLEV,KOLJU L, STOJANOVA,ELENA S
Year of Publication 15.12.1987