Allegra 1981, Signet Book

ISBN-13: 9780451096111

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Allegra 1977, Star, London

ISBN-13: 9780352397089

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Allegra 1976, Signet Book

ISBN-13: 9780451068606

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Allegra 1976, Signet Book

ISBN-13: 9780451078513

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Allegra 1975, Walker & Company, New York, NY

ISBN-13: 9780802704757

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