Matthäus, J., Baeck, L., & Friedrich Brodnitz. (2009). "You have the right to be hopeful if you do your duty": Ten Letters by Leo Baeck to Friedrich Brodnitz, 1937-1941. Year Book / Leo Baeck Institute.

Matthäus, Jürgen, Leo Baeck, and Friedrich Brodnitz. ""You Have the Right to Be Hopeful If You Do Your Duty": Ten Letters by Leo Baeck to Friedrich Brodnitz, 1937-1941." Year Book / Leo Baeck Institute 2009.

Matthäus, Jürgen, et al. ""You Have the Right to Be Hopeful If You Do Your Duty": Ten Letters by Leo Baeck to Friedrich Brodnitz, 1937-1941." Year Book / Leo Baeck Institute, 2009.