@incollection { Hartmann1923,
title = {Zur Soziologie der Revolution : Korreferat },
author = {Hartmann, Ludo Moritz },
pages = {24-39 },
year = {1923 },
publisher = {Mohr Siebeck },
url = {http://nbn-resolving.de/urn:nbn:de:0168-ssoar-190155 },
}