The ProQuest History Vault includes a database containing scanned and searchable records of the Immigration and Naturalization Service spanning 1880-1930. Major areas encompass:
- Mexican Immigration, 1906-1930
- Ellis Island, 1900-1933
- European Investigations, 1898-1936
- Prostitution and White Slavery, 1902-1933
- Suppression of Aliens, 1906-1930
- Asian Immigration and Exclusion, 1898-1941
