@incollection{MarkSmith-fc,
  author	= {Mark, David M. and Smith, Barry},
  editor	= {Bishop, Michael P. and Shroder, Jack},
  URL		= {http://wings.buffalo.edu/philosophy/faculty/smith/articles/topography.pdf},
  pdf		= {http://wings.buffalo.edu/philosophy/faculty/smith/articles/topography.pdf},
  title		= {A Science of Topography: From Qualitative Ontology to Digital Representations},
  booktitle	= {Geographic Information Science and Mountain Geomorphology},
  publisher	= {Springer-Praxis},
  address	= {Chichester},
  year		= {forthcoming}
}