00309nam a2200121Ia 450000500170000000800410001702000220005808200130008010000170009324500410011026000280015130000080017920260520112706.0260520s9999    xx            000 0 und d  a978-0-141-98250-2  a158bSEN  aSen, Amartya 0aCollective Choice and Social Welfare  bPenguin BooksaUKc2017  a601