Here are entered compositions not in a specific form or of a specific type for piano, violin and cello.Compositions not in a specific form or of a specific type for piano and two other solo instruments are entered under Trios, followed by medium of performance, e.g. Trios (Piano, clarinet, cello); Trios (Piano, violins (2)).Compositions not in a specific form or of a specific type for three pianos are entered under the heading Piano ensembles.Compositions not in a specific form or of a specific type for three players at one piano are entered under the headings Piano music (5 hands) or Piano music (6 hands).Works on ensembles that perform piano trios are entered under Piano trios (Musical groups). --headings for forms and types of music that include "piano trio" and headings with medium of performance that include "piano trio"
Here are entered compositions not in a specific form or of a specific type for violin, viola and cello and collections of compositions in several forms or types for various combinations of three bowed stringed instruments.Compositions not in a specific form or of a specific type for combinations of three specified stringed instruments other than violin, viola and cello are entered under this heading followed by the instruments in score order. --headings for forms and types of music that include "string trio" and headings with medium of performance that include "string trio"
--headings for music of individual instruments followed by the qualifier "(Rap)" and the subdivisions Methods (Rap) and Studies and exercises (Rap) under individual musical instruments and families of instruments
