Interview with Ada Fabiana Duque, Colombian-born immigrant to Rockwall, Texas, for the DFW Metroplex Immigrants Oral History Project. The interview includes Duque's family background and the risks that accompanied being financially successful in Colombia during the Colombian civil war, the guerrilla violence in Colombia in the 1980s and 1990s, her experience as an exchange student to Illinois in 1992, her expectations about the U.S., education and employment in food engineering, the process of acquiring citizenship through political asylum, and her opinions about U.S. immigration policy and cultural assimilation, as well as reflections on American identity.

Interview with J. Frank Rollins, an oilman and a geophysicist, concerning his work experience with Petty Geophysical Engineering Company doing refraction seismic work; his employment with Geophysical Service, Inc.; doing reflection and refraction work in 1936; oil exploration in South America; work in oil field instrumentation equipment; work as a "computer" interpreting geological data; founding of Rayflex Exploration Company in 1948; technological developments for oil field exploration; geochemical surveying; the sale of Rayflex to Phillips-Eckhart in 1962; his work as a geophysical consultant; the application of oil field technology to national defense; German espionage activity in South America during World War II; and pro-German activity in South Louisiana during World War II.