Columbia subject headings:
Butler, Martin, 1960---Manuscripts--Facsimiles.
Music--Manuscripts--Facsimiles.
Sextets (Clarinet, horn, harp, percussion, violin, cello)--Scores.
Harvard subject headings:
Princeton subject headings:
Butler, Martin--Manuscripts--Facsimiles.
Music--Manuscripts--Facsimiles.
Scores.
Sextets (Clarinet, horn, harp, percussion, violin, cello)--Scores.