Potsdam University Library has a unique, large collection of Judaica, including numerous works in Hebrew and Yiddish. Publications that are not freely accessible online are gradually digitized and made accessible to the public.
Lemberg : Bi-defus shel ha-Rav ha-gevir ha-mefursam mo.h.R.r. Avraham Yosef ben ... Aharon Madpis Segal z.ts.l. ; Lemberg : בדפוס של הרב הגביר המפורסם מוהר״ר אברהם יוסף בן ... אהרן מדפיס סג״ל זצ״ל ; Lemberg : gedrukt bei Abr. Jos. Madfes, 624 = 1864