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- United States11,479
- United States. Congress. House. Committee on Rules. (1849-50; 1880- )5,209
- SpringerLink (Online service)5,126
- United States. Congress. Senate. Committee on Rules and Administration. (1947- )1,949
- United States. Congress. House. Committee on House Administration. (1947- )1,634
- United States. Congress. House1,268
- Jordan, Benjamin Everett, 1896-1974886
- ebrary, Inc815
- United States. National Aeronautics and Space Administration725
- United States. Congress. Senate625
- Cannon, Howard Walter, 1912-2002552
- SPIE Digital Library528
- Hays, Wayne Levere, 1911-1989490
- Langley Research Center466
- Society of Photo-optical Instrumentation Engineers444
- Bolling, Richard, 1916-1991432
- Sabath, Adolph Joachim, 1866-1952424
- Society of Photo-Optical Instrumentation Engineers380
- United States. Congress. House. Committee on Elections. (1789-1895)358
- Allen, Leo Elwood, 1898-1973335