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- Livre électroniqueUnited States Census Figures Back to 1630United States. Bureau of the Census
- Livre électroniqueThe 1990 United States CensusUnited States. Bureau of the Census
- Livre électroniqueThe 1990 United States Census [2nd]United States. Bureau of the Census
- Livre électroniqueThe 1990 United States Census [2nd]United States. Bureau of the Census
- Livre électroniqueUnited States Census Figures Back to 1630United States. Bureau of the Census