00317nam a2200121Ia 4500008004100000020001800041100001800059245005200077250001200129260003700141260000900178300000800187240115s9999    xx            000 0 und d  a0-393-92702-4  aHal R. Varian 0aIntermediate Micro EconomicsbA Modern Approach  aSeventh  bW. W. Norton & CompanyaNew York  c2006  a715