00504nam a2200181Ia 4500082001700000100001900017245004500036260003400081300001000115490003800125500000500163690000600168700000500174952009900179964001700278921001000295999001700305  a517bW493.VU  aWerner, Helmut  aVorle sung uber approximati onstheorieb  aBerlinbSpringer-Verlagc1966  a184p.  aLecture notes in Mathematicsv 14  a  a   a  00104070aISIbISId1998-09-24l0o517 W493.VUpDP14981r2019-02-14 00:00:00w2019-02-14yBK  abcdefg  a13737  c13737d13737