1. Columbia University Rare Book & Manuscript Library, MS X893 Z8 v.2 no.4 DS ID: DS18578 Title: Letter and Hebrew text Author: Avraham Dov Place: Hungary Date: 1807.
2. University of Pennsylvania, CAJS Rar Ms 485 DS ID: DS25926 Title: Pinkas Place: Hartmannswiller and France Date: 1837-1850].