Whallon, Evan. Review of “The Unanswered Question, for Chamber Orchestra. “Performable Also as Chamber Music) by Charles Ives; Calcium Light, for Orchestra by Charles Ives.” Notes 11. no. 4 (September 1954): 607.
Austin, Larry. “Charles Ives’s Life Pulse Prelude for Percussion Orchestra: A Realization for Modem Performance from Sketches for His Universe Symphony.” Percussionist 23, no. 6 (1985): 58-84.
Austin, Larry. “Reconstruction of Ives’ Universe Symphony.” In Desert Plants: Conversations with 23 American Musicians, interviewed by Walter Zimmermann, 207-220. Vancouver, BC: A.R.C. Publications, 1976.