Dr. Sophia Adriana Krijn wrote at least two books: Naar IJsland (Amsterdam 1928) and Het poëties realisme in Denemarken (Groningen 1931).
Lastly she was a Dutch teacher at the Jewish Lyceum in Amsterdam.
Addition of a visitor of the website
A photo and additional information on Sophia Adriana Krijn is available on the website of Westerborkportretten
This person is commemorated on a memorial in Amsterdam. More information on this memorial can be found (in Dutch) on the website of the Nationaal Comité 4 en 5 mei.