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Paper図書

Izd-vo na Bŭlgarskata akademii͡a na naukite1989.<DA83-A77>

National Diet Library

Subject Heading技術革新. 科学技術 (地理区分) 生産性. ブルガリア. Technological innovations -- Bulgaria. Science and industry -- Bulg...

Paper図書

Издателство на българската академия на науките1984

Other Libraries in Japan

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