Congress of Dutch Teachers in Krasnapolsky, Prof. dr. van Gelder, W. van der Gedel, prof. dr. Nieuwenhuis and E. Steenbergen Date: 28 December 1965 Keywords: Educators, congresses Personal name: E. Steenbergen, W. Van Der Gedel Prof. Dr. Nieuwenhuis Institution name: Krasnapolsky

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