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1по Eric A. Hanushek, Stephen Machin, Ludger WoessmannFull text available on ScienceDirect[4/6/11]
Опубликовано 2011Off-Campus Access: Athens ID and Password Required
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2по Eric A. Hanushek, Stephen Machin, Ludger WoessmannFull text available on ScienceDirect[4/27/16]
Опубликовано 2016Off-Campus Access: Athens ID and Password Required
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3по Eric A. Hanushek, Stephen Machin, Ludger WoessmannFull text available on ScienceDirect[9/29/11]
Опубликовано 2011Off-Campus Access: Athens ID and Password Required
On-Campus Access: No User ID or Password Required
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