by DRAGANOV,STEFCHO I.,BG
Year of Publication 16.01.1989

by DRAGANOV,STEFCHO I.,BG
Year of Publication 15.11.1988

by SIMITCHIEV,KHRISTO A.,BG, DRAGANOV,STEFCHO I.,BG, KANAZIRSKA,VENETA D.,BG
Year of Publication 15.05.1989

by PESHEV,TOMA JJ.,BG, KUZMANOVA,BOJJKA G.,BG, POPOV,KOJJCHO D.,BG, DOJJCHINOVA,IGLIKA C.,BG, DRAGANOV,STEFCHO I.,BG, BORISOVA,SNEZHANA K.,BG
Year of Publication 14.04.1989