found: Cearley, G.W. The Delta family history, c1985:t.p. (Delta Air Lines)
found: LC data base, 1/6/86(hdg.: Delta Air Lines, inc.; usage: Delta Air Lines)
found: NUCMC data from Atlanta Historical Society for Atlanta Airport/Hanger One collection, 1920-1980(Delta Airlines)
found: Delta Flight Museum website, viewed 25 February 2021:Founding (Delta; incorporation as Huff Daland Dusters on 2 March 1925; purchased by C. E. Woolman and Travis Oliver and reincorporated as Delta Air Service on 3 December 1928; following purchase of Southern Air Fast Express, reincorporated as Delta Air Corporation in Louisiana; began doing business as Delta Air Lines in 1934 and officially renamed Delta Air Lines in 1945; merged with Chicago and Southern Air Lines in 1953) - https://www.deltamuseum.org/ found: Delta website, viewed 25 February 2021:Fact sheet. Corporate stats and facts (Delta Air Lines; airline industry; headquarters: Atlanta, Ga., U.S.A.) - https://news.delta.com/ notfound: Davies, R.E.G. Airlines of the United States since 1914, 1972: p. 341 (Chicago and Southern Air Lines ... merged with Delta Air Lines, 1 May 1953);Delta Air Corporation. Annual report, 1944: t.p. (Delta Air Corporation)
