00513nam a2200169Ia 4500003000900000008004100009020001800050040001600068080001200084100002000096245012600116250001200242260004400254300001400298650001400312650001700326IN-BaIIA211028s9999    xx            000 0 eng d  a0-03-006228-4  cIIA Library  a52bZEI  aZeilik, Michael 0aIntroductory astronomy and astrophysicscMichael Zeilik and Stephen A. Gregory                                             a4th ed.  aPhiladelphiabSaunders Publishingc1998  axv, 515p.  aAstronomy  aAstrophysics