by OSTROVSKI,VASSIL N.,BG, PETROV,VALENTIN G.,BG, BATSCHVAROV,RUMEN D.,BG, STOJANOV,PEJO T.,BG, NIKOLOV,IVAN D.,BG, BALEVSKI,ANGEL T.,BG, NIKOLSCHOV,ALEXANDER S.,BG, MOMTSCHILOV,EMIL N.,BG, LJUBENOV,TOSCHKO K.,BG
Year of Publication 28.03.1989