00349nam a2200133Ia 4500008004100000020001000041040001600051041001200067082001600079100002000095245002700115260005900142300001400201230917s9999||||xx |||||||||||||| ||und||  cDFE90  e17391aMAIN  aEnglish  a333.7 N582E  aNifkamp, P, ed. 0aEnviournment economics  aLeidenbMartinus Nifheff social science divisionc1976  axi,122 p.