Peter Duffett-Smith

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Practical Astronomy with your Calculator
Duffett-Smith, Peter

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� 5.88

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Astronomy with your Personal Computer
Duffett-Smith, Peter

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� 7.04

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Astronomy Personal Computer 2ed
Duffett-Smith, Peter

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� 9.63

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Easy PC Astronomy with floppy disk
Duffett-Smith, Peter

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� 8.46

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Practical Astronomy with your Calculator or Spreadsheet
Duffett-Smith, Peter

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� 27.60

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Astronomy with your Personal Computer
Duffett-Smith, Peter

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� 44.52

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Practical Astronomy Calculator 2
Duffett-Smith

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� 4.67

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Practical Astronomy with your Calculator
Duffett-Smith

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� 7.73

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