Einar Lauritzen and Gunar Lundquist published the definitive American Film Index, 1908-1915, and its companion volume for the years 1916 through 1920. The current work indexes Lauritzen and Lundquist's works and stands in its own right as a definitive reference work on early American filmmaking, with or without access to the ground-breaking predecessor volume. This work lists 33,664 films, 23,159 names, 1,025 companies and 785 works that were adapted into movies. The work includes extensive cross-referencing and see references for alternate titles and names.