00000nz  a2200000n  4500
001  KSH1998004783
005  19990504130353
008  980429 n azknn|abn          |a a|a    | 
150  ▼a효용 가치[效用價値]▲
550  ▼wg▼a가치(경제)[價値]▲
550  ▼a효용 가치설[效用價値說]▲
550  ▼a효용[效用]▲