Schäfer, ErnstErnstSchäfer2023-07-172004-09-142023-07-171912http://nbn-resolving.de/urn:nbn:de:hebis:26-opus-17715https://jlupub.ub.uni-giessen.de/handle/jlupub/18334http://dx.doi.org/10.22029/jlupub-17698deIn Copyrightddc:930