Oral history interview with Walter H. Evans, III conducted by Jim Strassmaier from June 6-9, 1988, as part of the Senator Mark O. Hatfield Oral History Project. Evans served as an aide and legal counsel to Hatfield.

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 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 Wesley Granberg-Michaelson conducted by Jim Strassmaier from October 18, 1988, to May 28, 1989, as part of the Senator Mark O. Hatfield Oral History Project. Granberg-Michaelson served as a foreign policy advisor on Hatfield's staff from 1969 to 1976.

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 Jim Towey conducted by Jim Strassmaier on June 2, 1988, as part of the Senator Mark O. Hatfield Oral History Project. Towey was an aide to Hatfield.