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 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 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 Jack Robertson conducted by Clark Hansen from November 7 to December 30, 1988, as part of the Senator Mark O. Hatfield Oral History Project. Robertson was a legislative aide and press secretary for Hatfield from 1973 to 1982.