Adams, R. N.1965 "Migraciones internas en Guatemala: expansion agraria de los indigenas Kekchies hacia el Petén," Guatemala: Centro Editorial, Jose de Pineda Ibarra
2.
Bossert, Thomas1979 "Activities Report and Update," post-doctoral research on Central American health policymaking, funded by the Tinker Foundation, unpublished
3.
Dirección General de Estadistica1965VI Censo de poblacion: población y habitaci6n de la Repüblica, 1964 , Guatemala: Ministerio de Economia1973VII Censo de población de la República , Guatemala: Ministerio de Economia
4.
Guerra Borges, A.1969Geografia economia de Guatemala, Guatemala: Editorial Universitaria (Vol. I, No. 58), Universidad de San Carlos
5.
Melville, Thomas and Marjorie1971, Guatemala—Another Vietnam? , Middlesex, England: Penguin Books
6.
Millet, Artimus1974 "The Agricultural Colonization of West Central Petén, Guatemala: A Case Study of Frontier Settlement by Cooperatives," unpublished doctoral dissertation
7.
Peckenham, Nancy1980 "Land Settlement in the Petén," Latin American Perspectives, VII (Spring and Summer), 169-177
8.
Reina, Ruben E.1961The Abandonment of Primicias by Itza of San Jose and Socotz, British Honduras, Philadelphia : University Museum (Tikal Report #10), University of Pennsylvania