Biblio

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2004
Guth, P.  L.. "The Geometry of Line–of–Sight and Weapons Fan Algorithms." In Studies in Military Geography and Geology, edited by D.  R. Caldwell, J. Ehlen and R.  S. Harmon, 271-285. Kluwer, Dordrecht, The Netherlands: Geological Society of America Reviews in Engineering Geology, 2004.
2001
Guth, P.  L.. "Quantifying terrain fabric in digital elevation models." In The environmental legacy of military operations, edited by J. Ehlen and R.  S. Harmon, 13-25. Vol. 14. Geological Society of America Reviews in Engineering Geology, 2001.