000  $anz n  2
000  $a주제어
001  $aKSH1998007787
005  $a20021127145456
008  $a980429 n azknnaabn          |a a|a    | 
150  $a개념 피드백[槪念--]
450  $wr$i영어$aconceptual feedback
550  $wg$a피드백(환류)[feedback]