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