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1by Keller, Aimee K., Wallace, John R., Horness, Beth H., Hamel, Owen S., Stewart, Ian J.
Published 2012-04article bibliotecaUNESCO -
2by Ralston, Stephen, Punt, André E., Hamel, Owen S., DeVore, John D., Conser, Ramon J.
Published 2011article bibliotecaUNESCO