[1] Cohen was responsible for reuniting the two halves of the oldest dated Jewish manuscript from the German lands.
While working in an archive, she recognized that the partial manuscript of a Jewish holiday prayer book that she was examining was the other half of a prayer book that she had examined in another archive.
[2] The manuscript was the personal prayer book of Qalonimos ben Yehuda dated 28 Tevet, 5050 (January 12, 1290), Esslingen am Neckar.
[2] Cohen is noted particularly for her work on the role of Jewish women in commissioning, owning and using books in the medieval period and Renaissance.
[1] Cohen received the 1985 National Jewish Book Award in the Visual Arts category for her book on the Rothschild Maḥzor of 1492 co-authored with Menachem Schmelzer.