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
