Jack C. Ellis' A History of Film (Englewood Cliffs, N.J.: Prentice-Hall, 1978---$11.95, paper) John L. Fell's A History of Films (New York: Holt, Rinehart & Winston, 1978---price not given, paper) Anthony Slide's Aspects of American Film History Prior to 1920 (Metuchen, N.J.: Scarecrow Press, 1978---$7.50). In the short (173 pages) Two recent additions to the Ungar Film Library (New York: Frederick Ungar Publishing Co., 1978---at prices shown)