Oral history interview with Gerry Frank conducted by Jim Strassmaier from May 25, 1988, to May 2, 1990, as part of the Senator Mark O. Hatfield Oral History Project. Frank supported Hatfield's political career and served as his chief of staff.

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 Richard H. Jones conducted by Jim Strassmaier from December 11, 1987, to January 13, 1988, as part of the Senator Mark O. Hatfield Oral History Project. Jones served as Hatfield's campaign chair in 1958, 1966, 1978, and 1984.

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.

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.

Oral history interview with Wendell Wyatt conducted by Clark Hansen from May 17-19, 1988, as part of the Senator Mark O. Hatfield Oral History Project. Wyatt was a U.S. congressman from Oregon.