By Compton R.J.   Levine S.C.   in Brain and Cognition

ISSN:0278-2626|35|2|168-183

Academic Press‎(1997)‎

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By Gao F.   Levine S.C.   Huttenlocher J.   in Journal of Experimental Child Psychology

ISSN:0022-0965|77|1|20-29

Academic Press‎(2000)‎

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