000 00299nam a2200097Ia 4500
008 120224s9999 xx 000 0 und d
082 _a333.7
_bCON
100 _aConrad, Jon M.
245 _aNatural resource economic : notes and problems
260 _bCambridge University Press
_aNew York
_c1987
999 _c135575
_d135575