1. Columbia University Rare Book & Manuscript Library, MS General 320 DS ID: DS19073 Title: Pinkas and Record Place: Altona and Germany Date: 1729-1746.
2. University of Pennsylvania, CAJS Rar Ms 559e DS ID: DS25934 Title: Letter Author: Natan-Noṭe ben David, (Ożarów, Poland) Place: Danzig Date: 12 Elul 5529 (11 January 1769)