Code 160 - Geographic Area CodeOptional Not repeatable. Indicators not defined.Subfields: a - Geographic Area Code (R) 0 - Instruction phrase 2 - Subject system code 3 - Authority entry record number 5 - Tracing control(1) Relationship code a=earlier heading b=later heading d=acronym e=pseudonym f=real name g=broader term h=narrower term z=other (2) Reference suppression code 0=suppress reference6 - Interfield linking data(1) Linking Explanation Code a=alternate script z=other (2) Linking Number (3) Tag of Linked Field7 - Scriptba=Latin ca=Cyrillic da=Japanese - script unspecified db=Japanese - kanji dc=Japanese - kana ea=Chinese fa=Arabic ga=Greek ha=Hebrew ia=Thai ja=Devanagari ka=Korean la=Tamil zz=Other8 - Language of cataloging