Kirkpatrick, John. Ives’s Transcendental Achievement. John Kirkpatrick Papers. Mss. 56, Folder 568, Box 61. Irving S. Gilmore Music Library, Yale University. Unpublished typescript, July 4, 1958.

Elliott Schwartz and Barney Childs, eds. Contemporary Composers on Contemporary Music. New York, NY: Holt, Rinehart and Winston, 1967.

Perry, Rosalie Sandra. “Charles Ives and American Culture.” Ph.D. diss., University of Texas at Austin, 1971.

Layton, Bentley. “An Introduction to the 114 Songs of Charles Ives.” Senior Thesis, Harvard University, 1963.

Kearns, William Kay. “Horatio Parker, 1863-1919: A Study of His Life and Music.” Ph.D. Thesis, University of Illinois, 1965.

Yellin, Victor Fell. Review of Essays Before a Sonata and Other Writings, by Charles Ivesedited by Howard Boatwright. Journal of the American Musicological Society 17 (1964): 229-231.

Yates, Peter. “An Introduction to Charles Ives.” In Twentieth Century Music: Its Evolution from the End of the Harmonic Era into the Present Era of Sound, 252-270. New York: Pantheon Books, 1967.

Yates, Peter. “Charles Ives: An American Composer.” Parnassus: Poetry in Review 3 (1975): 318-28.

Wasson, Jeffrey. “The Organ Works of Charles Ives: A Research Summary.” Student Musicologists at Minnesota 6 (1975-76): 280-89.

Ward, Charles. “Charles Ives’s Concept of Music.” Current Musicology, no. 18 (1974): 114-19.