000			00348nam a2200157Ia 4500
008			131111s9999 xx 000 0 und d
100			_aSiebert,Horst
245			_aEconomics of the environment
250			_a5th ed.
260			_aNew York
260			_bSpringer
260			_c1988
300			_a313p.
650			_aEconomics
763			_a26929
999			_c35163 _d35163