00000nz  a2200000n  4500
001  KSH2002036257
005  20021209110206
008  021209 n azknn|abn          |a a|a    | 
150  ▼a제사족 원소[第四族元素]▲
550  ▼wg▼a원소(물질)[元素]▲
550  ▼wh▼a러더퍼듐[rutherfordium]▲
550  ▼wh▼a지르코늄[zirconium]▲
550  ▼wh▼a티탄(티타늄)[titanium]▲
550  ▼wh▼a하프늄[hafnium]▲
550  ▼a주기율표[週期律表]▲