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 Marty B. Gold conducted by Clark Hansen from June 13-16, 1988, as part of the Senator Mark O. Hatfield Oral History Project. Gold was a legal assistant to Hatfield.

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.