Oral history interviews with Helen Manix conducted by Art Rader on October 29, 1974 and November 01, 1974 for the Ralph Roske Oral History Project on Early Las Vegas. In the interviews, Helen Manix discusses moving to Boulder City, Nevada in 1939 with her husband, John Manix, to operate a general merchandise store. Helen Manix and her son, Joseph "Joe" Manix, Jr., also discuss their local community, Boulder (Hoover) Dam, and their experiences in Boulder City during World War II.

Oral history interview with Helen Manix conducted by Sherry O’Neil on October 25, 1972 for the Ralph Roske Oral History Project on Early Las Vegas. In this interview Helen Manix shares her experiences in Boulder City, Nevada as the owner of the first department store. Manix discusses the construction of Boulder (Hoover) Dam and the growth of Las Vegas, Nevada as gambling became legal.

Oral history interview with Mike Markoff conducted by an unidentified collector on an unknown date in the 1970s for the Ralph Roske Oral History Project on Early Las Vegas. Markoff discusses the Boulder (Hoover) Dam from a construction worker's perspective. Markoff then discusses the negative environmental effects that casinos and other buildings had on Las Vegas, Nevada. Markoff later discusses hunting around the Las Vegas, Nevada area.

Oral history interview with Jean McColl conducted by Sam C. Melchiome Jr. on March 01, 1977 for the Ralph Roske Oral History Project on Early Las Vegas. In the interview, McColl discusses her childhood and family in Searchlight, Nevada and her eventual move to Las Vegas, Nevada in 1944. McColl also discusses her education, Boulder (Hoover) Dam, Mount Charleston, Lee Canyon, atomic testing, Las Vegas entertainment, and juvenile delinquency.

Oral history interview with Mary Carol Melton conducted by Kathy Ricks on March 05, 1981 for the Ralph Roske Oral History Project on Early Las Vegas. Melton discusses early life in Henderson, Nevada and recalls the development of the United Methodist Church in Las Vegas, Nevada. Melton speaks about moving to Las Vegas because of her husband’s health, her time working with attorney offices and in the Las Vegas Courthouse, and the different homes in which her family lived. Moreover, Melton talks extensively about starting the first Sunday school in North Las Vegas in a garage as well as the church she and her husband built. Melton discusses the programs and minstrels performed in the church, the crafts sold to make money for the church and the organ they purchased. Lastly, Melton talks about going to the Hoover Dam nearly every week to see new developments, her participation in the Daughters of the American Revolution (DAR), and watching the above ground atomic tests.

Oral history interview with Morgan Mills conducted by Matthew Carr on March 26, 1981 for the Ralph Roske Oral History Project on Early Las Vegas. In this interview, Mills discusses being involved in major projects in the Las Vegas, Nevada area while he was living in California. Mills also discusses Boulder City, Nevada and Reno, Nevada. He later discusses his career as an electrical engineer, as well as working on the Hoover Dam (Boulder Dam).

Oral history interview with Carl Mortensen conducted by Carloyn Grattan on March 03, 1977 for the Ralph Roske Oral History Project on Early Las Vegas. In this interview, Mortensen discusses moving to Las Vegas, Nevada in 1951. Mortensen discusses the Boulder (Hoover) Dam as well as the growth of Las Vegas. Mortensen also discusses atomic testing.