University of Nebraska Press
  • Mapping Spheres of Influence on Medieval Iberia's Religious Frontier via Viewshed Analysis and Cost-Distance Analysis
Figure 1. Spain, 910-1492. (William Shepherd, Historical Atlas. New York: Henry Holt and Company, 1911)
Figure 1.

Spain, 910-1492. (William Shepherd, Historical Atlas. New York: Henry Holt and Company, 1911) http://www.lib.utexas.edu/maps/historical/shepherd_1911/shepherd-c-082-083.jpg

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