000  $anz n  2
000  $a주제어
001  $aKSH2002039319
005  $a20021226014426
008  $a021218 n azknnaabn          |a a|a    | 
150  $a산수학[算數學]
550  $wg$a수학(교과과목)[數學]
550  $a산술[算術]