Here are entered works on films designed to impart skills or techniques to general audiences, typically in a "how-to" manner. Works about films intended for teaching and informational purposes, especially those made for classroom viewing, are entered under Educational films.
Here are entered miscellaneous collections of chamber music for various combinations of two through nine solo instruments or voices with instrumental accompaniment.Collections for the same combination of solo performers, and individual works, are entered under headings specifying the medium of performance, e.g. Bassoon music (Bassoons (2)); Duets (Unspecified instruments (2)); String quartets; Suites (Bassoon, clarinet, trombone, violin); Vocal quartets with instrumental ensemble.