00269nam a2200109Ia 4500008004100000040002500041082001200066100002100078245003000099260002200129300000800151230627s9999    xx            000 0 und d  aNORSU-SiacNORSU-Sia  a550 W67  aWilliams , Linda 0aEarth science demystified  bMcGraw-Hillc2004  a390