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1за авторством Eric A. Hanushek, Stephen Machin, Ludger WoessmannFull text available on ScienceDirect[4/6/11]
Опубліковано 2011Off-Campus Access: Athens ID and Password Required
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2за авторством Eric A. Hanushek, Stephen Machin, Ludger WoessmannFull text available on ScienceDirect[4/27/16]
Опубліковано 2016Off-Campus Access: Athens ID and Password Required
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3за авторством Eric A. Hanushek, Stephen Machin, Ludger WoessmannFull text available on ScienceDirect[9/29/11]
Опубліковано 2011Off-Campus Access: Athens ID and Password Required
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