- Angeles, Victoria de los1
- Davis, Peter G.1
- De Gaetani, Jan1
- Gilbert, W. S. (William Schwenck), 1836-19111
- Metropolitan Opera (New York, N.Y.)1
- New York City Opera1
- New York Philharmonic1
- Rare Book and Manuscript Library1
- Rorem, Ned, 1923-1
- Sills, Beverly1
- Teatro alla Scala1
- Upshaw, Dawn1