@misc{OPUS4-9030, title = {Oberbarnimer Kreiskalender 1939}, booktitle = {Kalender f{\"u}r den Kreis Ober-Barnim}, volume = {28.1939}, institution = {Land Brandenburg}, series = {Kalender f{\"u}r den Kreis Ober-Barnim}, number = {1939}, type = {periodicalpart}, year = {2015}, }