000			00344nam a2200133Ia 4500
001			23506
008			170722s9999 xx 000 0 und d
100			_aStearn, Colin W.
245			_aGeological evolution of north America /
250			_a3rd ed.
260			_aNew York : _bJohn Wiley & Sons , _c1979.
300			_a566 p. _c23cms
942			_cGEN
999			_c96705 _d96705