by GOCHEVA,BISTRA S, CANKOV,LJUBOMIR D
Year of Publication 15.04.1986

by KISOV,VESELIN D, CANKOV,LJUBOMIR D
Year of Publication 15.04.1985

by KOLAROV,MITKO P, GOCHEVA,BISTRA S, CANKOV,LJUBOMIR D
Year of Publication 15.08.1986

by STOJJKOV,VLADIMIR C, GOCHEVA,BISTRA S, CANKOV,LJUBOMIR D, MLADENOV,ALEKSANDR S, STAVREV,BORISLAV I
Year of Publication 15.04.1986

by GOCHEVA,BISTRA S, GELEVA,NENKA S, CANKOV,LJUBOMIR D, MOMERIN,KHRISTO A
Year of Publication 15.05.1984

by CANKOV,LJUBOMIR D, MOMERIN,KHRISTO A
Year of Publication 12.12.1979

by KALCHEV,STOJAN V, KISOV,VESELIN D, GEORGIEV,GEORGI L, GOCHEVA,BISTRA S, CANKOV,LJUBOMIR D, GELEVA,PENKA S, KOSTOV,MLADEN L, MARKOV,LJUBEN I, KOLEV,KONSTANTIN G, GUZGUNOV,ANTON G, RADOMIROV,RASHKO K
Year of Publication 15.08.1985

by CANKOV,LJUBOMIR D, MOMERIN,KHRISTO A, GOCHEVA,BISTRA M
Year of Publication 16.05.1983

by BOZHINOV,BOZHIDAR A, TOPALOV,TIKHOMIR A, MITEV,STEFAN P, DOBREV,DOBRI D, VELICHKOV,ANTON I, VUTOV,LJUBOMIR A, KOLEV,KONSTANTIN G, GUZGUNOV,ANTON G, KALCHEV,STOJAN V, POPOV,TODOR V, CANKOV,LJUBOMIR D, MOMERIN,KHRISTO A, MANDALIEV,GEORGI M, KHADZHIDIMITROV,DIMITR I, RADOMIROV,RASHKO K
Year of Publication 14.03.1987

by KOLAROV,MITKO P, STEFANOV,PETO S, CANKOV,LJUBOMIR D, GOCHEVA, BISTRA S, SHIKOV,IVAN J
Year of Publication 15.04.1983