Grünewald, Martin, and Florian Schimikowski. “Eastern Bloc Agents in West Germany: Archaeology of Cold War Revisited With New Discovery of Soviet Spy Radio in Elsdorf-Heppendorf (Rhineland)”. Journal of Contemporary Archaeology 10, no. 2 (April 15, 2024): 192–210. Accessed July 27, 2024. https://journal.equinoxpub.com/JCA/article/view/25281.