Steinbrink, Lisa Yvonne. “Charles Edward Ives: his relationship to other composers, his general composition techniques, and an analaysis[sic] of the second string quartet.” M.M. thesis, University of Colorado, 1989.
Urban, Marshall Linwood. “An investigation into elements of abstract compositional language, program, and philosophical expression in Charles Ives' "General William Booth Enters into Heaven”.” M.M. thesis, Boston University, 1988.