Oral history interview with Elston L. Ireland conducted by Curtis Johnson on November 21, 1980, as part of the Drive-in Restaurants of Portland Oral History Project. Ireland was a restaurateur affiliated with a total of 14 restaurants in Portland, Oregon, and Seattle, Washington, over the course of his career, including Ireland's Restaurant in Portland.

Oral history interview with Sherman G. Marriott conducted by Curtis Johnson on November 17, 1980, as part of the Drive-in Restaurants of Portland Oral History Project. Marriott opened the Tik Tok Drive In in Portland, Oregon, in 1936.

Oral history interview with Eugene M. Waddle conducted by Curtis Johnson on November 21, 1980, as part of the Drive-in Restaurants of Portland Oral History Project. Waddle founded Waddle's Restaurant on Hayden Island and the Original Taco House in Southeast Portland, Oregon.

Oral history interview with Steven P. Yaw conducted by Curtis Johnson on November 12, 1980, as part of the Drive-in Restaurants of Portland Oral History Project. Yaw was the grandson of W.P. Yaw, the founder of Yaw's Top Notch, and ran the restaurant until its closure in 1985.