Donohew, Leo E. The Determination of the Vocational Opportunities for Commercial Graduates of the Smaller and Medium-Sized High Schools, Together with Suggestions for Changes in the Curricula of the High Schools for Lafayette County, Missouri, thesis, 1941; (https://digital.library.unt.edu/ark:/67531/metadc70294/m1/1/: accessed November 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .