This page contains links to supplementary variable information not included in the variable descriptions and comparability discusstions in the data dictionary.

• 1880 Sickness on Day of Enumeration Codes
• 1970 Mother Tongue Components
• 1980 Language Spoken at Home
• 1990 Language Code List
• 1980 IPUMS Ancestry Conversion
• 1990 IPUMS Ancestry Conversion
• 1980 Ancestry Code Components
• 1990 Ancestry Code Components
• 1990 Race Category Composition
• 1990 Hispanic Origin Codes
• 1990 Topcodes and State Medians for Values Above Topcodes
• 1990 Definition of Poverty Status