by RASHEV,COLO V, DOBREV,STEFAN I, PETKANCHIN,LJUBOMIR T, ANDREEV,NIKOLA P, BONEV,STOJAN P, NIKOLOV,IVAN D, POPOV,IVAJJLO D, SAVOV,GEORGI D, PEJJCHEV,IVAN M
Year of Publication 16.12.1985

by VALKOV, LJUDMIL K, ZHEKOV, KRASIMIR ZH, STOJANCHEV, PAVEL P, TANKOVSKI, IVAN N, STOJANOV, STOJAN M, ZHIRKOV, KIRIL G, ZLATEV, ZLATEMIR I, RASHEVA, IVANKA A, RASHEV, TSOLO V, KAJTAZOV, GEORGI V, BONEV, STOJAN P
Year of Publication 15.11.1989

by RASHEV,COLO V.,BG, BONEV,STOJAN P.,BG, RASHEVA,IVANKA A.,BG, STOJJCHEV,TODOR V.,BG, SKRYNCHENKO,JURIJJ M.,SU, MOSHKEVICH,LARISA D.,SU, SOJJNIKOV,IGOR' F.,SU, GEORGIEV,RAJJKO B.,BG, EVLAMPIEVA,NATAL'JA E.,SU, MICHEV,V'LCHO S.,BG, VNUKOV,JURIJJ N.,SU
Year of Publication 15.03.1989

by BONEV,STOJAN P.,BG, MINCHEV,PAVEL M.,BG, GEORGIEV,ASEN P.,BG, ARSOV,BOJAN JA.,BG, IGNATOV,NIKOLA S.,BG, PEJJCHEV,IVAN M.,BG, KR'STEV,GEORGI I.,BG, PETROV,PET'R A.,BG, DIMITROV,MARIN A.,BG
Year of Publication 15.09.1988