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Practical astronomy with your calculator or Spreadsheet
Peter Duffett-Smith, Jonathan Zwart
Bok Engelsk 2011
Easy PC astronomy
Peter Duffett-Smith
Bok Engelsk 1997
Astronomy with your personal computer
Peter Duffett-Smith
Bok Engelsk 1990
Practical astronomy with your calculator
Peter Duffett-Smith
Bok Engelsk 1988
Practical astronomy with your calculator
Peter Duffett-Smith
Bok Engelsk 1981
Practical astronomy with your calculator
Peter Duffett-Smith
Bok Språk ikke angitt 1979