1. Site planning principles and concepts of directionality among the ancient Maya;Ashmore;Latin American Antiquity,1991
2. Checklist of the vascular plants of Belize with common names and uses;Balick;Memoirs of the New York Botanical Garden,2000
3. Diagnostic opal phytoliths from rinds of selected cucurbita species;Bozarth;American Antiquity,1987
4. S.R. Bozarth, Opal phytoliths, in: W. Lees, J. Reynolds, T.J. Martin, M. Adair, S. Bozarth (Eds), Final Summary Report, 1986 Archaeological Investigations at 14MN328, a Great Bend Aspect Site Along U.S. Highway 56, Marion, Kansas, Archeology Department, Kansas State History Society, 1989, pp. 85–90.
5. Diagnostic opal phytoliths from pods of selected varieties of common beans (Phaseolus vulgaris);Bozarth;American Antiquity,1990