New Unesco source book for science teaching.

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Údar corparáideach: Unesco
Formáid: LEABHAR
Teanga:English
Foilsithe / Cruthaithe: Paris, Hyderabad, India : Unesco, ; University press 1979.
Ábhair:
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Ayesha Abed Library: General Shelf

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Gairmuimhir: 507 NEW
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