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보웬, 윌, 199.1-보66부 | 세종서적 | 2009 199.1-보66부,
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블랜차드, 켄, 325.04-블293추 | 청림출판 | 2009 325.04-블293추,
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US Department of Education [, ]
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Lawrence Erlbaum Associates [, ]
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American Society of Civil Engineers [, ]
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