00304nam a2200109Ia 4500008004100000020001800041082001500059100001700074245005400091260004100145300000800186190710s9999    xx            000 0 und d  a0-7619-3597-1  a333.7 Si64  aSingh, Katar 0aEnvironmental economics : theory and applications  aLos AngelesbSage Publicationsc2007  a423