Oral history interview with Robert Svilar conducted by Curtis Johnson from September 10-11, 1980, as part of the Drive-in Restaurants of Portland Oral History Project. Svilar was a police officer with the Portland Police Bureau and was known as "Officer Bob the Tootsie Roll Cop" at Yaw's Top Notch drive-in restaurant in Portland, Oregon.

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 Charlie M. Yaw conducted by Curtis Johnson on November 19, 1980, as part of the Drive-in Restaurants of Portland Oral History Project. Yaw worked as a carhop at drive-in restaurants in Portland, Oregon, during the 1960s.

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.