00000nz  a2200000n  4500
001  KSH2005014150
005  20050416210835
008  050416 n azknn|abn          |a a|a    | 
150  ▼a층위 지질학[層位地質學]▲
450  ▼wr▼i영어▼astratigraphic geology▲
550  ▼wg▼a지질학[地質學]▲
550  ▼a층서학[層序學]▲
550  ▼a층위 트랩[層位--]▲