Martha Ruben-Wolf (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Martha Ruben-Wolf" in English language version.

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Hermann Weber; Andreas Herbst. "Ruben-Wolf, Martha * 17.6.1887, † 16.8.1939". Handbuch der Deutschen Kommunisten. Karl Dietz Verlag, Berlin & Bundesstiftung zur Aufarbeitung der SED-Diktatur, Berlin. Retrieved 9 June 2017.
Hermann Weber; Andreas Herbst. "Ruben-Wolf, Lothar * 17.6.1882, † 15.1.19389". Handbuch der Deutschen Kommunisten. Karl Dietz Verlag, Berlin & Bundesstiftung zur Aufarbeitung der SED-Diktatur, Berlin. Retrieved 13 June 2017.

"Dr. Med. Martha Ruben-Wolf, Abtreibung oder Verhutung?, (Abortion or prevention/ contraception): Title image from "At the Doctor's" by Käthe Kollwitz". Collections Database. Although this source implies the pamphlet first appeared in 1931, other sources suggest that it had already appeared in earlier editions before 1929. Five Colleges and Historic Deerfield Museum Consortium. Retrieved 11 June 2017.

Reinhard Müller (October 2006). "Stalinism and Exile: Biographies in a Context of Terror". Hamburger Institut für Sozialforschung. Retrieved 13 June 2017.