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1Book/Monograph/Conference Proceedings bibliotecaUNESCO
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2Book/Monograph/Conference Proceedings bibliotecaUNESCO
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3Book/Monograph/Conference Proceedings bibliotecaUNESCO
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4by Sternin, V.G., Israel Program for Scientific Translations, Jerusalem eng 28622, Nikonorov, I.V., Bumeister, Yu.K.
Published 1976Texto bibliotecaFAO IT