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1
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2
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3book part bibliotecaUNESCO
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4book part bibliotecaUNESCO
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5book part bibliotecaUNESCO
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6
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7by International Union of Pure and Applied Chemistry. Committee on Teaching of Chemistry, Rao, C.N.R., Waddington, D.J.programme and meeting document bibliotecaUNESCO
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8
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9
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10by Workshop on Locally Produced Laboratory Equipment for Chemical Education, Copenhagen, 1983, Royal Danish School of Educational Studies. Dept of Chemistry, Thulstrup, Erik W., Waddington, D.J.programme and meeting document bibliotecaUNESCO