Heller Carl G. [Correspondence between Meyer Bodansky and Carl G. Heller - August 1940], letter, August 22, 1940; (https://texashistory.unt.edu/ark:/67531/metapth228451/m1/1/: accessed November 16, 2018), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .