1.
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London, [England] : Longmans, 1961. ©2007
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2.
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London : Longmans, Green, and Co., 1958. ©2007
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3.
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London, [England] : Longmans, 1962. ©2007
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4.
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London, England : Longmans, Green & Co Ltd, 1960. ©2007
|
5.
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London, [England] : Longmans, Green, and Co., 1957. ©2007
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6.
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London, England : Longmans, Green & Co Ltd, 1959. ©2007
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