Urbina, Manuel. [Language Missions Report of Missionary Work for Manuel Urbina for the month ending March 25, 1962], text, August 25, 1962; (https://texashistory.unt.edu/ark:/67531/metapth221961/m1/1/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .