Publisher
- Internal-Revenue Office8
- International (Canadian) Boundary Commissions9
- International Agricultural Development Service11
- International American Conference, 1901-021
- International American Conference, 19101
- International Boundary Commission, United States and Mexico11
- International Boundary and Water Commission, United States and Mexico12
- International Broadcasting Board1
- International Bureau of the American Republics50
- International Business Operations Bureau20
- International Commerce Bureau1,887
- International Commission for Equitable Distribution of Waters of the Rio Grande5
- International Congress of Navigation2
- International Cooperation Administration281
- International Development Advisory Board4
- International Development Agency263
- International Economics Programs Office2
- International Exchange Service35
- International Exchange, Commission on3
- International Expositions Committee2