ピアノロール
Elaine Obenchain: The complete catalog of Ampico Reproducing Piano rolls. New York: American Piano Co., ca.. 1977. ISBN 0-9601172-1-0; (out of print).
Charles Davis Smith: Duo-Art piano music: a complete classified catalog of music recorded for the Duo-Art reproducing piano compiled and annotated by Charles Davis Smith. Monrovia, California, ca. 1987; (out of print).