Johanna Cohen-Hartog died at age 71 in Camp Westerbork on 28 February 1943. She was buried at the Jewish cemetery in Assen on 3 March 1943.
Jewish Historical Museum, Documents collection, inv.nr 3397; Death register of the Jewish community Assen
The funeral records at the Jewish cemetery in Assen reveal that Johanna Hartog was buried there.
This person is commemorated on a memorial in Assen. More information on this memorial can be found (in Dutch) on the website of the Nationaal Comité 4 en 5 mei.