By Usery E. Lynn   Finn Michael P.   Cox John D.   Beard Thomas   Ruhl Sheila   Bearden Morgan   in Cartography and Geographic Information Science

ISSN:1545-0465|30|1|69-79

Cartography and Geographic Information Society‎(2003)‎

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By Usery E. Lynn   Finn Michael P.   Scheidt Douglas J.   Ruhl Sheila   Beard Thomas   Bearden Morgan   in Journal of Geographical Systems

ISSN:1435-5930|6|3|289-306

Springer Publishing Company ‎(2004)‎

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