1. The collapse of Maya civilization: a review of previous theories;Adams,1973
2. Radar mapping archeology, and ancient Maya land use;Adams;Science,1981
3. The origins of civilization in the Maya lowlands;Adams,1977
4. The origins of civilization in the Maya lowlands;Adams,1977
5. Travels through North and South Carolina, Georgia, east and west Florida, the Cherokee country, the extensive territories of the Muscogulges, or Creek Confederacy, and the country of the Chactaws;Bartram,1791