Dallas County (Tex.). Dallas County Probate Case 2431: Coolidge, Joel B. (Deceased), legal document, 1900-06-07/1903-03-27; (https://texashistory.unt.edu/ark:/67531/metapth587150/m1/1/: accessed December 18, 2018), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .