00536nam a2200181Ia 4500003000900000008004100009020001800050040001600068080002000084100002500104245008300129260004800212300001600260650001400276650002500290650002600315650001300341IN-BaIIA211028s9999    xx            000 0 eng d  a0-521-56052-7  cIIA Library  a52:519.682bDUF  aDuffett-Smith, Peter 0aEasy PC astronomycPeter Duffett-Smith                                          aCambridgebCambridge University Pressc1997  axiii, 151p.  aAstronomy  aAstroscript software  aProgramming languages  aSoftware