By Björn Piia Maria   Leppänen Paavo H.T.   in Educational Psychology

ISSN:1469-5820|33|6|671-689

Routledge Ltd‎(2013)‎

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By Björn Piia M.   Kakkuri Irma   Karvonen Pirkko   Leppänen Paavo H.T.   in Early Child Development and Care

ISSN:0300-4430|182|3-4|435-451

Routledge Ltd‎(2012)‎

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