Here are entered compositions not in a specific form or of a specific type for piano, violin, viola and cello.Compositions not in a specific form or or a specific type for piano and three other solo instruments are entered under Quartets followed by medium of performance, e.g. Quartets (Piano, violins (2), cello). --headings for forms and types of music that include "piano quartet" and headings for medium of performance that include "piano quartet"
Here are entered musical compositions for player piano. The perforated rolls intended for use on player pianos and works about such rolls are entered under Player piano rolls. --headings for forms and types of music that include "player piano" or "player pianos" and headings with medium of performance that include "player piano" or "player pianos"