00000nz  a2200000n  4500
001  KSH2006003035
005  20060427135505
008  060427 n azknn|abn          |a a|a    | 
150  ▼a간접 외부 효과[間接外部效果]▲
450  ▼wr▼i영어▼aindirect externality▲
550  ▼wg▼a외부 효과[外部效果]▲
550  ▼a직접 외부 효과[直接外部效果]▲