00000nz  a2200000n  4500
001  KSH1998028509
005  20021106092211
008  980429 n azknn|abn          |a a|a    | 
150  ▼a역문헌 빈도[逆文獻頻度]▲
450  ▼wr▼i영어▼ainverse document frequency▲
550  ▼wg▼a색인법[索引法]▲
550  ▼wg▼a자동 색인[自動索引]▲
550  ▼a색인[索引]▲