World Union for Progressive Judaism. MSS Collection No. 16. Petuchowski wrote extensively on prayerbooks and halakhah and was involved in interfaith activities. Each correspondent having more than 5 items has been placed in a separate folder. Much of the correspondence relates to Petuchowski's publishing career and his research on Jewish prayerbooks.
Correspondence is in both English and Hebrew.
Some manuscripts are in German. Correspondence relating to the publications may also be included in the series. Many of the events occurred at HUC-JIR, Cincinnati, Ohio. 2 Agus, Jakob B. 3 Altman, Alexander. 4 Baeck, Leo.