@book{MaierPohlschmidt2010,
  author    = {Petra Maier and Monika Pohlschmidt},
  title     = {Nachlassverzeichnis von Gerhard Helbig : 29.12.1929 - 29.05.2008},
  publisher = {Institut f{\"u}r Deutsche Sprache},
  address   = {Mannheim},
  url       = {https://nbn-resolving.org/urn:nbn:de:bsz:mh39-6928},
  year      = {2010},
  language  = {de}
}