Hartwig, HelmutHelmutHartwig2022-07-182009-01-222022-07-181992http://nbn-resolving.de/urn:nbn:de:hebis:26-opus-67691https://jlupub.ub.uni-giessen.de/handle/jlupub/3332http://dx.doi.org/10.22029/jlupub-3025deIn Copyrightddc:780