Perry Douglas Erwin WWI-era letters, 1918-1919, 2007-009. The University of Tulsa, McFarlin Library, Department of Special Collections & University Archives.
Perry Douglas Erwin WWI-era letters, 1918-1919, 2007-009. The University of Tulsa, McFarlin Library, Department of Special Collections & University Archives. https://utulsa.as.atlas-sys.com/repositories/2/resources/73 Accessed August 13, 2022.