@misc{OPUS4-9031, title = {Oberbarnimer Kreiskalender 1940}, booktitle = {Kalender f{\"u}r den Kreis Ober-Barnim}, editor = {Rudolf Schmidt}, volume = {29.1940}, institution = {Land Brandenburg}, series = {Kalender f{\"u}r den Kreis Ober-Barnim}, number = {1940}, type = {periodicalpart}, year = {2015}, }