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41Published 1981, 28 september.Subjects: “…[Trade union training.]…”
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50by Haas, Joh. deSubjects: “…[Vrouwenbond NVV., Trade union training.]…”
Published 1970, 2 september.
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51by Haas, Joh. deSubjects: “…[Kupersoord (Amersfoort), Trade union training.]…”
Published 1961, februari.
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58Published 1947, June 8-17Subjects: “…[General Council of the World Federation of Trade Unions.]…”
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