Webster, D. L. (1976). Defensive earthworks at Becan, Campeche, Mexico: Implications for Maya warfare. Middle American Research Institute, Tulane University.
Citace podle Chicago (17th ed.)Webster, David L. Defensive Earthworks at Becan, Campeche, Mexico: Implications for Maya Warfare. New Orleans: Middle American Research Institute, Tulane University, 1976.
Citace podle MLA (8th ed.)Webster, David L. Defensive Earthworks at Becan, Campeche, Mexico: Implications for Maya Warfare. Middle American Research Institute, Tulane University, 1976.
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