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Helsinki: Suomalainen Tiedesakatemia, 1962
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[London]: Teachers TV/UK Department of Education, 2006 ; Alexandria, VA: Alexander Street Press, 2012
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Hershey, Pennsylvania (701 E. Chocolate Avenue, Hershey, Pennsylvania, 17033, USA): IGI Global, 2018
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[London]: Teachers TV/UK Department of Education, 2008
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[England]: Teachers TV/UK Department of Education, 2008 ; Alexandria, VA: Alexander Street Press, 2012
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[London]: Teachers TV/UK Department of Education, 2005 ; Alexandria, VA: Alexander Street Press, 2012
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[England]: Teachers TV/UK Department of Education, 2006 ; Alexandria, VA: Alexander Street Press, 2012
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[England]: Teachers TV/UK Department of Education, 2005 ; Alexandria, VA: Alexander Street Press, 2012
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[London]: Teachers TV/UK Department of Education, 2005
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[England]: Teachers TV/UK Department of Education, 2010 ; Alexandria, VA: Alexander Street Press, 2012
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[England]: Teachers TV/UK Department of Education, 2005 ; Alexandria, VA: Alexander Street Press, 2012
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[England]: Teachers TV/UK Department of Education, 2005 ; Alexandria, VA: Alexander Street Press, 2012
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[England]: Teachers TV/UK Department of Education, 2005
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Hershey, Pennsylvania (701 E. Chocolate Avenue, Hershey, Pa., 17033, USA): IGI Global, 2014
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Washington, DC, 2012
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World Bank, Washington, DC, 2011
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Washington, DC, 2013