000 00287nam a2200097Ia 4500
008 240404s9999 xx 000 0 und d
100 _aMorris, Robert A. (Ed.)
245 0 _aUmbral calculus and Hopf algebras
_cRobert A. Morris (Ed.)
260 _aProvidence
_bAMS
_c1990
942 _aIMAR
_cCART
999 _c33852
_d33852