1. Columbia University Rare Book & Manuscript Library, MS X893 Se6 DS ID: DS19341 Title: Polemics Author: Joshua Benzion Segre Place: Italy Date: 1790.
2. Columbia University Rare Book & Manuscript Library, MS X893 M84 DS ID: DS19736 Title: Theological text and Polemics Author: Saúl Levi Morteira Place: undetermined Date: 1600.