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International technical conference on the protection of nature : Lake Success, 22-29-VIII-1949 : proceedings and papers = Conférence technique internationale pour la protection de la nature : Lake Success, 22-29-VIII-1949 : procès-verbaux et rapports / ed. by the secretariat of the International union for the protection of nature.
- UNESCO,
- 1950.
- Paris [etc.] :
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The Mexican cultural mission programme / by Lloyd H. Hughes.
- UNESCO,
- 1950.
- Paris :
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Co-operatives and fundamental education / by Maurice Colombain ; [ill. by Heiri Steiner].
- UNESCO,
- 1950.
- Paris :
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War-handicapped children : report on the European situation / by Thérèse Brosse.
- 840.1
- UNESCO,
- 1950.
- Paris :
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Homeless children : report of the proceedings of the conferene of director's communities, Trogen, Switzerland / by Thérèse Brosse.
- UNESCO,
- 1950.
- Paris :
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A selected bibliography = Bibliographie choisie / United Nations educational, scientific and cultural organization.
- UNESCO,
- 1950.
- Paris :
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L'art spontané chez les jeunes egyptiens : dessin, sculpture, tapisserie.
- 704.9425 U567
- Unesco.
- UNESCO,
- 1950.
- Paris :