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- Metropolitan Opera (New York, N.Y.), performer570
- Project Muse534
- Metropolitan Museum of Art (New York, N.Y.)429
- ebrary, Inc402
- Geological Survey (U.S.), issuing body324
- AM (Publisher), digitiser223
- Project Muse. distributor220
- Gilder Lehrman Institute of American History, owner203
- New York (State)166
- Readex (Firm)141
- Adam Matthew Digital (Firm), digitiser128
- Adam Matthew Digital (Firm)121
- Verdi, Giuseppe, 1813-1901116
- New York (State). General Assembly112
- New York (State). Legislature102
- Levine, James, 1943-2021100
- Beers, Andrew, 1749-182497
- Hutchins, John Nathan, 1700 or 1701-178294
- Geological Survey (U.S.)93
- CBS Inc., production company88