Ritgen, Hugo vonHugo vonRitgen2022-06-032017-04-121881http://nbn-resolving.de/urn:nbn:de:hebis:26-opus-126223https://jlupub.ub.uni-giessen.de/handle/jlupub/1114http://dx.doi.org/10.22029/jlupub-956deIn Copyrightddc:943