00371nam a2200133Ia 4500020001500000082002600015100002000041245004700061260003400108300002000142490006500162500000500227700000500232  a3540160817  a338.8263337bSc296.RE  aSchafer, Martin  aResource extraction and market structureb  aBerlinbSpringer-Verlagc1986  aix, 154p. Bibl.  aLecture notes in Economics and Mathematical systemsv v. 263  a  a