On Some Aspects of Continuing Vocational Training in Bulgaria von KALCHEV, Rumen

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Върху някои аспекти на продължаващото професионално обучение в България von KALCHEV, Rumen

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СОЦИАЛНА ОТГОВОРНОСТ НА БИЗНЕСА И ЗАПЛАЩАНЕТО НА ТРУДА В БЪЛГАРИЯ von KALCHEV, Rumen

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DEVICE FOR PURIFYING SEWAGE WATER von AKIM EHDUARD L'VOVICH, KALCHEV RUMEN, MANDRE JURIJ GEORGIEVICH, SMIRNOV MIKHAIL NIKOLAEVICH

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METHOD OF OBTAINING ALKALI LIGNIN von AKIM EHDUARD L'VOVICH, KALCHEV RUMEN, MANDRE JURIJ GEORGIEVICH, SMIRNOV MIKHAIL NIKOLAEVICH

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METHOD OF SEWAGE WATER PURIFICATION BY PRESSURE FLOTATION von AKIM EHDUARD L'VOVICH, KALCHEV RUMEN, MANDRE JURIJ GEORGIEVICH, SMIRNOV MIKHAIL NIKOLAEVICH

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Physicochemical characteristics of dam lakes in Southwestern Bulgaria von Traykov, I., Sofia University "St. Kliment Okhridski", Sofia (Bulgaria), Tosheva, A., Sofia University "St. Kliment Okhridski", Sofia (Bulgaria), Uzunova, E., Sofia University "St. Kliment Okhridski", Sofia (Bulgaria)

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Conference Committees

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