Oral history interview with Marian J. Bruner conducted by Clark Hansen on June 18, 1988, as part of the Senator Mark O. Hatfield Oral History Project. Bruner was executive assistant to Hatfield from 1967 to 1981.

Oral history interview with Frank C. Cook conducted by Clark Hansen from November 29-30, 1989, as part of the Senator Mark O. Hatfield Oral History Project. Cook was an aide to Hatfield from 1969 to 1973.

Oral history interview with Jenna L. Dorn conducted by Clark Hansen from June 13-15, 1988, as part of the Senator Mark O. Hatfield Oral History Project. Dorn was a legislative assistant to Hatfield from 1977 to 1981.

Oral history interview with Thomas R. Getman conducted by James Strassmaier from June 3-8, 1988, as part of the Senator Mark O. Hatfield Oral History Project. Getman was legislative director for Hatfield from 1978 to 1985.

Oral history interview with Mark O. Hatfield conducted by Clark Hansen from July 29, 1998, to May 22, 2002, as part of the Senator Mark O. Hatfield Oral History Project. Hatfield was an Oregon state legislator, Oregon secretary of state, Oregon governor, and a U.S. senator.

Oral history interview with Tom J. Imeson conducted by Michael O'Rourke from September 14 to December 9, 1988, as part of the Senator Mark O. Hatfield Oral History Project. Imeson served on Hatfield's staff from 1969 to 1985.

Oral history interview with J. Keith Kennedy conducted by Jim Strassmaier on June 8, 1988, as part of the Senator Mark O. Hatfield Oral History Project. Kennedy was staff director for the Senate Appropriations Committee.

Oral history interview with Sam H. Mallicoat conducted by Clark Hansen from May 23-27, 1988, as part of the Senator Mark O. Hatfield Oral History Project. Mallicoat was Hatfield's chief of staff from 1967 to 1973.

Interview with Wayne Morse conducted as part of his 1968 re-election campaign. Morse was a U.S. Senator from Oregon.

Oral history interview with Maurine B. Neuberger conducted by Clark Hansen from August 26 to December 12, 1991, as part of the Oregon Legislature Oral History Series. Neuberger served in the Oregon House of Representatives from 1951 to 1955 and in the U.S. Senate from 1960 to 1964.