00490nam a2200181Ia 4500082001700000100001800017245004000035260002500075300001000100490003900110500000500149690000600154700000500160952009900165964001700264921001000281999001700291  a516bP689.CC  aPittie, H. V.  aCharacteric classes of foliationsb  aLondonbPitmanc1976  a107p.  aResearch notes in Mathematicsv 10  a  a   a  00104070aISIbISId1998-09-22l0o516 P689.CCpDP11970r2019-02-14 00:00:00w2019-02-14yBK  abcdefg  a12946  c12946d12946