Incoming Resources
- Johan van der Keuken, the complete collection, Vol. 1, Disc 2
- Variations on America, [orchestration by William Schuman] Symphony no. 1, in D minor. The unanswered question
- Universe symphony, Orchestral set, no. 2 ; The unanswered question, Charles Ives
- The music of Charles Ives, vol. 1
- Amʹeriques, Varèse. Symphony no. 4 ; The unanswered question / Ives