The American Film Institute Catalog of Motion Pictures
Produced in the United States: Feature Films, 1921-1930, two volumes
Kenneth W. Munden, executive editor

New York, New York : R.R. Bowker Company : 1971.

Nearly-complete documentation of American feature films from the 1920s. One of the essential reference works. Unreliable as to the exact names of production and distribution companies. The two-volume set was reprinted by the University of California Press in 1997.

PSFL source: AFI-F2.