@book{ShelleySnyder2012,
  author    = {Rowland M. Shelley and Bruce A. Snyder},
  title     = {Millipeds from the eastern Dakotas and western Minnesota, USA, with an account of Pseudopolydesmus serratus (Say, 1821) (Polydesmida: Polydesmidae); first published records from six states and the District of Columbia},
  year      = {2012}
}