Code 750 - Linking Heading - Topical subject
Repeatable for alterantive script forms. Indicators not defined
Subfields: a - Entry element (NR) x - Topical subdivision (R) y - Geographical subdivision (R) z - Chronological subdivision (R)
Control subfields:
2 - Subject system code (NR) 3 - Record number (NR) 7 - Script (NR) 8 - Language of cataloging (NR)
Code 801 - Originating source
Mandatory, repeatable. First Indicator blank Second Indicator: Function indicator
0=Original cataloging agency 1=Transcribing agency 2=Modifying agency 3=Issuing agency
Subfields: a - Country (NR) b - Agency (NR) c - Date of transaction (NR)