00292nam a2200121Ia 4500082001700000100001800017245002600035260003600061300002100097490004200118500000500160700000500165  a512bW784.SF  aWinter, David  aStructure of fieldsb  aNew YorkbSpringer-Verlagc1974  axii, 205p. Index  aGraduate texts in Mathematicsv v. 16  a  a