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Peter Duffett-Smith

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Astronomy with your Personal Computer by Peter Duffett-Smith
$140.00
Astronomy with your Personal Computer
by Peter Duffett-Smith ~ Paperback / softback
Available - Usually ships in 3-4 weeks
Practical Astronomy with your Calculator or Spreadsheet by Peter Duffett-Smith
$91.00
Practical Astronomy with your Calculator or Spreadsheet
by Peter Duffett-Smith ~ Paperback / softback
Available - Usually ships in 3-4 weeks