Confirmation Certificate, 13.01.1986 on the effectiveness of the scientific trip to West Berlin
Extract, 10.04.1985
Information, 10.04.1986about scientific collaboration
Report, 24.03.1985-31.03.1985
Report and its drafts, 19.04.1985on the results of the visit
Short Report, 13.04.1985on the trip to West Berlin
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