Abstract of paper presented to the American Ethnological Society, 1961. Subsequently published in the "Journal of East Asian Studies." Vol. 8, No. 1, p. 15-20.

Reports preliminary results of study of pollen samples from La Atalaya, La Cofradia and Cerro de Moctehuma archaeological sites. The 4-zone stratified pollen sequence from La Ayala allows the other two sites to be cross-dated. Subsequently published in Southern Illinois Museum Papers.