Columbia subject headings:
Trios (Piano, horn, violin)--Scores and parts.
Harvard subject headings:
Harbison, John--Manuscripts--Facsimiles.
Music--Manuscripts--Facsimiles.
Trios (Piano, horn, violin)--Scores and parts.
Princeton subject headings:
Parts (Music)
Scores.
Trios (Piano, horn, violin)--Scores and parts.