Urbina, Manuel. [Language Missions Report of Missionary Work for Manuel Urbina for the month ending June 25, 1964], text, June 25, 1964; (https://texashistory.unt.edu/ark:/67531/metapth221977/m1/1/: accessed June 20, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .