by APOSTOLOV, RUMEN K, POPOV, ENCHO N
Year of Publication 15.03.1990

by POPOV, ANGEL J, APOSTOLOV, RUMEN K, POPOV, ENCHO N, VELICHKOV, VELICHKO M
Year of Publication 15.06.1992

by APOSTOLOV, RUMEN K, POMAKOV, PETAR J, GEORGIEV, GEORGI A, KATSAROV, KHRISTO B, POPOV, ENCHO N
Year of Publication 15.06.1990

by APOSTOLOV, RUMEN K, GEORGIEV, GEORGI A, POPOV, ENCHO N, DRAGNEV, ILIJA R, APOSTOLOV, KHRISTO B
Year of Publication 15.02.1990

by GEORGIEV; GEORGI A, PENKOV; JULII S, KATZAROV; HRISTO B, APOSTOLOV; RUMEN K, POPOV; ENTCHO N
Year of Publication 14.04.1987

by POPOV,ENCHO N, DRAGANOV,NIKOLA D, TAKOV,IVAN M, APOSTOLOV,RUMEN K, ZAKHARIEV,VLADIMIR A
Year of Publication 14.11.1986

by POPOV,ENCHO N, GEORGIEV,GEORGI A, BCHVAROV,IVAN G, APOSTOLOV,RUMEN K
Year of Publication 15.08.1986

by POPOV,ENCHO N, GEORGIEV,GEORGI A, PENKOV,JULIJJ S, APOSTOLOV,RUMEN K
Year of Publication 15.08.1986

by POPOV,ENCHO N, GEORGIEV,GEORGI A, PENKOV,JULIJJ S, APOSTOLOV,RUMEN K, KACAROV,KHRISTO B
Year of Publication 15.08.1986

by BACHVAROV, IVAN G, APOSTOLOV, RUMEN K, GEORGIEV, GEORGI A, KATSAROV, KHRISTO B, POPOV, ENCHO N, RAFAILOV, LJUBOMIR P
Year of Publication 15.03.1990

by DRENSKI, GEORGI L, ADARSKI, PENCHO K, APOSTOLOV, RUMEN K, GEORGIEV, GEORGI A, KATSAROV, KHRISTO B, POPOV, ENCHO N, PETKOVA, ILIANA P
Year of Publication 15.04.1992

by APOSTOLOV, RUMEN K, GEORGIEV, GEORGI A, KATSAROV, KHRISTO B, BOZUKOV, NIKOLAJ P, POPOV, ENCHO N, ZHECHEV, VASIL P, CHERNOGOROV, GICHO V
Year of Publication 15.04.1992

by POPOV,ENCHO N, SOGINDOLSKI,IVAN K, STANCHEV,GEORGI K, TRENDAFILOV,IVAN D, ATANASOV,RUMEN A, APOSTOLOV,RUMEN K
Year of Publication 16.07.1984

by POPOV,ENCHO N, PENKOV,JULIJJ S, TRENDAFILOV,IVAN D, ATANASOV,RUMEN A, STANILOV,KRSTJU A, APOSTOLOV,RUMEN K
Year of Publication 15.06.1984

by DRENSKI, GEORGI L, ADARSKI, PENCHO K, APOSTOLOV, RUMEN K, GEORGIEV, GEORGI A, STANILOV, KRASTJU A, KATSAROV, KHRISTO B, POPOV, ENCHO N
Year of Publication 15.06.1990

by ATANASOV, RUMEN A, APOSTOLOV, RUMEN K, GEORGIEV, GEORGI A, TRENEV, VASIL D, KATSAROV, KHRISTO B, POPOV, ENCHO N, TSANKOV, GEORGI L, KRUMOV, ASEN V
Year of Publication 15.11.1989

by BACVAROV,IVAN G.,BG, POPOV,ENCO N.,BG, GEORGIEV,GEORGI A.,BG, APOSTOLOV,RUMEN K.,BG
Year of Publication 15.11.1988

by TRENEV,VASIL D.,BG, ATANASOV,RUMEN A.,BG, POPOV,ENCHO N.,BG, APOSTOLOV,RUMEN K.,BG
Year of Publication 15.06.1988

by BACVAROV IVAN G. ,BG, APOSTOLOV RUMEN K. ,BG, POPOV ENCO N. ,BG, GEORGIEV GEORGI A. ,BG
Year of Publication 15.02.1988

by DUNDAROV; PANTCHO G, ADERSKI; PENTCHO K, GEORGIEV; GEORGI A, APOSTOLOV; RUMEN K, POPOV; ENTCHO N, STANILOV; KRESTYO A, RADKOV; PEYU V
Year of Publication 22.09.1987