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1Published 1989“...Sage in association with Open University,...”
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2Published 2004“...Routledge in association with the Open University,...”
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3Published 1992“...Polity Press in association with the Open University,...”
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4Published 1982“...M. Robertson in association with the Open University,...”
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5Published 1990“...Open University Press in association with the Open University,...”
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6Published 1994“...Cambridge University Press in association with the Open University,...”
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7Published 1990“...Open University Press in association with the Open University,...”
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