@incollection{Wandruszka1975,
  author    = {Mario Wandruszka},
  title     = {Mehrsprachigkeit : {\"O}ffentlicher Vortrag},
  series = {Sprachwissenschaft und Sprachdidaktik : Jahrbuch 1974 des Instituts f{\"u}r deutsche Sprache},
  editor    = {Hugo Moser},
  publisher = {Schwann},
  address   = {D{\"u}sseldorf},
  isbn      = {3-590-15636-8},
  url       = {https://nbn-resolving.org/urn:nbn:de:bsz:mh39-13306},
  pages     = {321 -- 350},
  year      = {1975},
  language  = {de}
}