00000nz  a2200000n  4500
001  KSH1998040909
005  20021208000000
008  980429 n azknn|abn          |a a|a    | 
150  ▼a침식 제어[浸蝕制御]▲
550  ▼a토양 침식[土壤浸蝕]▲