@unpublished{BaronDoherr2006,
  author  = {Frank Baron and Detlev Doherr},
  title   = {Exploring the Americas in a Humboldt Digital Library: Problems and Solutions},
  institution = {Fakult{\"a}t Maschinenbau und Verfahrenstechnik (M+V)},
  year    = {2006},
  language  = {en}
}