by ATANASSOV,LJUBEN P.,BG, ANTONOV,DIMO P.,BG, GEORGIEV,GEORGI A.,BG, MALESKOV,VLADIMIR D.,BG, RUSSEV,LJUBOMIR S.,BG, KOEN,ELIESER H.,BG
Year of Publication 18.12.1986

by ANDONOVA,ZVETANKA K,BG, BUROV,PETKOV K,BG, IVANOVA,KATJA G,BG, BONTSCHEV,PAVEL P,BG, ATANASSOV,LJUBEN P,BG, ROMANOV,DOBROMIR R,BG, MILEV,CHRISTO S,BG
Year of Publication 28.08.1985

by KOHEN,ELIESER H.,BG, ATANASSOV,LJUBEN P.,BG, ANTONOV,DIMO P.,BG, MALESCHKOV,VLADIMIR D.,BG, GEORGIEV,GEORGI A.,BG, RUSSEV,LJUBOMIR S.,BG
Year of Publication 22.08.1984