These are some of the resources used in writing the book My Dear Good Rosi: Letters from Nazi-occupied Holland, 1940-1943.

Jewish Gen — This website provides invaluable online databases and resources for researching Jewish family history.

Jewish Virtual Library

NIOD (Netherlands Institute for War, Holocaust, and Genocide Studies) — NIOD maintains archives and carries out historical studies on the Second World War.

Rijo — Susanne Rieger and Gerhard Jochem maintain an extensive website dedicated to Jewish life and history in Nuremberg, Furth, and environs. The site provides invaluable Holocaust records and documents.

United States Holocaust Museum

Wikipedia contributors, “History of the Jews in Germany”