@book{dryerorder-hhsWinklerUdmurt,
  author    = {Winkler, Eberhard},
  key       = {Winkler 2001},
  pages     = {85},
  publisher = {München: Lincom},
  series    = {Languages of the World/Materials},
  title     = {Udmurt},
  volume    = {212},
  year      = {2001}
}