Simon, Eric. “Der späte Ruhm des seltsamen Charles Ives” [The Be-lated Fame to the Singular Charles Ives]. HiFi--Stereophonie (January 1968) 7/1: 58-59.

Riemann, Hugo. Riemann Musik Lexikon, edited by Wilibald Gurlitt, 857--858. Vol. 1. 12th ed. Mainz, Germany: B. Schott, 1968.

Szigeti, Joseph. With Strings Attached, 104, 134, 333. New York, NY: Alfred A. Knopf, 1967.

Schafer, R. Murray. “Charles Ives and Perspective.” Ear Clearing: Notes for an Experimental Music Course, 31-36. Don Mills, Ontario: BMI Canada Limited, 1967.

Salzman, Eric. Twentieth -Century Music: An Introduction, 61, 64, 97, 143--148, 152, 164. Englewood Cliffs, NJ: Prentice- Hall, 1967.

Rublowsky, John. “Gershwin and Ives: The Triumph of the Popular Spirit.” In Music in America, 9, 155--166, 173. New York, NY: Crowell- Collier, 1967.

Rescigno, Eduardo. “Ascoltando il disco: [Charles Edward Ives] Holi-days Symphony.” La Musica Moderna 1/26 (1967): 158--160.

Peterson, Thomas Elliott. “The Music of Carl Ruggles in Relation to the 20th Century.” In The Music of Carl Ruggles. Ph.D. diss., University of Washington, 1967.

Meyer, Leonard B. Music, the Arts, and Ideas: Patterns and Predic-tions in Twentieth -Century Culture, 200. Chicago, IL: University of Chicago Press, 1967.

Marsh, Robert C. The Cleveland Orchestra. Cleveland, OH: World Pub-lishing, 1967.