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England : Longman, 1988 .
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62 p. : 21 cm.
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Essex, England : Longman, 1992 , Estado de la obra: Libr. Rayuela. 0-582-05530-X

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Essex, England : | New York : Longman ; | Wiley, 1986 0-582-30128-9

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England : Longman, 1986 0-582-30158-0