by MARINOVA,MARIJA D.,BG, MIRCHEV,MIKHAIL I.,BG, KONTROV,SAVA I.,BG, TAKHRILOV,KHRISTOFOR P.,BG, IVANOV,ATANAS K.,BG, RUSEVA,JJORDANKA I.,BG, RAJJKOV,GEORGI I.,BG, PANAJJOTOV,MARIN G.,BG, MARINOV,MARIN S.,BG
Year of Publication 16.05.1988

by DRAGOEV,LJUBOMIR JJ, TAKHRILOV,KHRISTOFOR P., BG, KONTROV,SAVA I
Year of Publication 15.01.1982