000  $anz n  2
000  $a주제어
001  $aKSH2000002081
005  $a20000320045600
008  $a000320 n azknnaabn          |a a|a    | 
150  $a로지스틱 곡선[--曲線]
450  $wr$i영어$alogistic curve
550  $a로지스틱[logistics]
550  $a인구 증가[人口增加]