By Finco Mark V.   Hepner George F.   in Cartography and Geographic Information Science

ISSN:1545-0465|26|4|243-252

Cartography and Geographic Information Society‎(1999)‎

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By Medina Richard M.   Siebeneck Laura K.   Hepner George F.   in Studies in Conflict and Terrorism

ISSN:1521-0731|34|11|862-882

Routledge Ltd‎(2011)‎

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