Zeitlin, Leon, 1876-

This collection contains a large amount of business and legal correspondence and documents pertaining to Auerbach's tenure with Tri-Ergon AG and Tobis Tonbild Syndikat AG, most of which revolve around legal proceedings (patent and civil) in Germany, Switzerland, and the United States concerning Tri-Ergon's sound-on-film technologies which had become film industry standard. The collection also has a folder of Auerbach's personal papers, a considerable number of family and personal photographs (some arranged in albums), some personal correspondence, and a few manuscripts for film projects.

This collection contains the economist Leon Zeitlin's personal and professional correspondence, mostly from the 1950s and 1960s, as well as a number of economic and autobiographical manuscripts.