Curtis, J. H., D. A. Hodell, and M. Brenner. 1996. Climate
variability on the Yucat�n Peninsula (M�xico) during the past 3500
years, and implications for Maya cultural evolution. Quaternary
Research 46:37-47.
Curtis, J. H., M. Brenner, D. A. Hodell, R. A. Balser, G. A.
Islebe, and H. Hooghiemstra. 1998. A multi-proxy study of Holocene
environmental change in the Maya Lowlands of Pet�n, Guatemala. J.
Paleolimnology 19:139-159.
Schwartz, N. 1990. Forest society: a social history of Pet�n,
Guatemala. University of Pennsylvania Press, Philadelphia.
Southgate, D. 1998. Tropical forest conservation: an economic
assessment of the alternatives in Latin America. Oxford University
Press, Oxford.