@techreport{OPUS4-8364,
  title     = {Umweltdaten aus Brandenburg},
  organization    = {Landesumweltamt Brandenburg},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-bbdig-173},
  pages     = {208},
  year      = {2002},
  language  = {de}
}
@techreport{OPUS4-8363,
  title     = {Umweltdaten aus Brandenburg},
  organization    = {Landesumweltamt Brandenburg},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-bbdig-180},
  pages     = {210},
  year      = {2003},
  language  = {de}
}