1. Radar Mapping, Archeology, and Ancient Maya Land Use
2. Agache, Roger 1964Archéologie Aerienne de la Somme: Recherches Nouvelles. Amiens: Imprimerie Gogois.
3. American Society of Photogrammetry 1983Manual of Remote Sensing. Falls Church, Virginia.
4. Avery, T. Eugene 1977Interpretation of Aerial Photographs. Minneapolis: Burgess.
5. Ethnohistory: An Historian's Viewpoint