Lockheed Horizons, Winter 1979-1980, periodical, Winter 1981; (https://texashistory.unt.edu/ark:/67531/metapth1091886/m1/1/: accessed June 4, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Lockheed Horizons, Winter 1979-1980, periodical, Winter 1981; (https://texashistory.unt.edu/ark:/67531/metapth1091886/m1/1/: accessed June 4, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .