Solar Engineering, Volume 1, Number 4, May 1976, periodical, May 1976; (https://texashistory.unt.edu/ark:/67531/metapth1319797/m1/1/: accessed May 1, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Solar Engineering, Volume 1, Number 4, May 1976, periodical, May 1976; (https://texashistory.unt.edu/ark:/67531/metapth1319797/m1/1/: accessed May 1, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .