1. 1964 America as Model: The demographic impact of European expansion upon the non-European world. XXXV Congreso Internacional de Americanistas, Mexico, 1962. Actas y Memorias. Volume 3. Mexico, pp. 381–382.
2. and 1948 The population of central Mexico in the sixteenth century. Ibero-Americana, 31.
3. 1962 Pioneering Christians among the perishing Indians of Tucson. Lima: Editorial Estudios Andinos, p. 399.
4. An Appraisal of Techniques with a New Hemispheric Estimate
5. 1939 Cultural and natural areas of native North America. University of California Publications in American Archaeology and Ethnology 38. Berkeley, p. 134.