BG44773
KAMENOV,EMIL B.,BG, MAVRODIEVA,RADMILA D.,BG, KRUMOV,IVAN K.,BG, KAMBERSKI,VASIL S.,BG, VIKTOROV,TODOR I.,BG, IVANOV,IVAN P.,BG, UZUNOV,KRUM L.,BG, KUCAROV,BOCHKO K.,BG, STOJANOV,VELICHKO V.,BG, VAKLEV,IVAN A.,BG, JJORDANOV,GEORGI V.,BG
Year of Publication 15.02.1989
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Year of Publication 15.02.1989
Patent