00286nam a2200121Ia 4500008004100000100001800041245003600059260002500095300000800120650001200128942000700140999001700147190216s9999||||xx |||||||||||||| ||und||  aMary Aldradge 0aAstronomy-The Earth And The Sky  bOrient Longmanc1973  a40p  aPhysics  cBK  c32990d32990