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 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 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.

Speeches and three items of correspondence of U.S. Senator John H. Mitchell (1935-1905). Mitchell was a U.S. senator for Oregon who servered at various points from the 1870s to the 1900s. In 1905, he was convicted of having accepted bribes, and he died while awaiting an appeal for his conviction.

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.

Oral history interview with Vera M. Springer conducted by Mary Mead in seven sessions, from August 9 to September 20, 1990, as part of the Oregon Legislature Oral History Series. Springer discusses her work for U.S. Senators Dick Neuberger and Maurine Neuberger from 1954 to 1966.