Astronomy with your Personal Com... by Duffett-Smith, Peter Paperback / softback

Astronomy with Your Personal Computer Paperback Peter J. Duffett-

Astronomy with your Personal Computer

Practical Astronomy with Your Calculator Paperback Peter Duffett-

Astronomy with Your Personal Computer by Duffett-Smith, Peter 1985 Spiral Bound

Practical Astronomy With Your Calculator (Second Edition) SC Spiral (1985)

Practical Astronomy with your Calculator by Peter Duffett-Smith

Practical Astronomy with your Cal- paperback, 9780521356992, Peter Duffett-Smith