Box 1: Encoding Level

Box 2: Meridian

Box 3: Publication Date Type (10)

Box 6: Country of Publication Code (11)

Box 7: Projection Code

Box 8: Record Group

Box 9: Relief Code

Box 10: Special Format Characteristics Code

Box 11: Index Indicator

Box 12: Language Code (12)

Box 17: Cataloging Source Code

Box 27: Bibliographical Level

Box 28: Modified Record Code

Box 34: Government Publication Code

Box 36: Descriptive Cataloging Form

Box 41: Record Type