Ritgen, Hugo vonHugo vonRitgen2022-06-032017-04-191881http://nbn-resolving.de/urn:nbn:de:hebis:26-opus-126233https://jlupub.ub.uni-giessen.de/handle/jlupub/1115http://dx.doi.org/10.22029/jlupub-957deIn Copyrightddc:943