000  $anz n  2
000  $a주제어
001  $aKSH2000000879
005  $a20000207122724
008  $a000207 n azknnaabn          |a a|a    | 
150  $a대수적 확대체[代數的擴大體]
450  $wr$i영어$aalgebraic extension field
550  $a대수학[代數學]