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London; Thousand Oaks, Calif: Sage, 1998
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London [u.a.]: SAGE, 2004
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1991
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Informa UK Limited, 2001
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SAGE Publications, 1998
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American Educational Research Association (AERA), 1995
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American Educational Research Association (AERA), 1993
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JSTOR, 1993
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JSTOR, 1986
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American Educational Research Association (AERA), 1986
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American Educational Research Association and American Statistical Association, 1986
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JSTOR, 1999
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SAGE Publications, 1998
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American Educational Research Association (AERA), 1995
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American Educational Research Association (AERA), 1995
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American Educational Research Association (AERA), 1995
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American Educational Research Association (AERA), 1995
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SAGE Publications, 1994
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Elsevier BV, 1994
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SAGE Publications, 1994