by IGNATOV,NIKOLA S.,BG, SEMERDZHIEV,NIKOLAJJ L.,BG, PETKANCHIN,LJUBOMIR T.,BG, ZIDAROV,DIMIT'R L.,BG
Year of Publication 15.12.1988

by PEJJCHEV,IVAN M.,BG, KR'STEV,GEORGI I.,BG, IGNATOV,NIKOLA S.,BG, KALEV,LJUBOMIR C.,BG, GEORGIEV,GEORGI K.,BG, KR'STEV,GEORGI K.,BG
Year of Publication 15.06.1989

by KR'STEV,GEORGI I.,BG, IGNATOV,NIKOLA S.,BG, KALEV,LJUBOMIR C.,BG, GEORGIEV,GEORGI K.,BG, KR'STEV,GEORGI K.,BG
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