Biblio
“Paleoecology And The Prehistoric Maya: A History Of Man-Land Relationships In The Tropics”. Geoscience. Geoscience. University of Arizona.
. 1974. “A Neoglacial Pollen Record From Osgood Swamp, California”. Geoscience. Geoscience. University of Arizona.
. 1973. “Some Palynological Applications Of Multivariate Statistics”. Geoscience. Geoscience. University of Arizona.
. 1970.