@incollection { Hartmann1969,
 title = {Die Nation als politischer Faktor},
 author = {Hartmann, Ludo Moritz},
 pages = {80-97},
 year = {1969},
 publisher = {Sauer u. Auvermann},
 url = {http://nbn-resolving.de/urn:nbn:de:0168-ssoar-187965},
}