00000nz  a2200000n  4500
001  KSH2006007103
005  20060722154442
008  060722 n azknn|abn          |a a|a    | 
150  ▼a한계 수송비 체감의 법칙[限界輸送費遞減--法則]▲
450  ▼wr▼i영어▼alaw of diminishing marginal transportation cost▲
550  ▼a수송비[輸送費]▲