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Naturgummi

Polymers of the organic compound isoprene, with minor impurities of other organic compounds; refined from latex harvested from rubber trees

National Museum of World Cultures Foundation

Public Library Pencho Slaveykov, Varna

Public Library Pencho Slaveykov, Varna

Public Library Pencho Slaveykov, Varna

Public Library Pencho Slaveykov, Varna

Public Library Pencho Slaveykov, Varna