00272nam a2200109Ia 4500082001700000100002200017245003600039260004800075300002900123500000500152700000500157  a516bB959.AD  aBurko, William L.  aApplied differential geometryb  aCambridgebCambridge University Pressc1985  axvii, 414p. Index, Bibl.  a  a