1985 Maize variability of potential interest to plant molecular geneticists. Maydica 30:225-33.
1987 Global crop resources. Science 236:617-18.
1988 With M. M. Goodman. Races of corn. In Corn and Corn Improvement, 3rd ed., eds. G. F. Sprague and J. W. Dudley, pp. 33-79. Madison, Wisconsin: American Society of Agronomy.
With H. A. Wallace. Corn and its Early Fathers, rev. ed. Ames: Iowa State University Press.
1992 With H. F. Robinson. The status, evolutionary significance and history of Eastern Cherokee maize. Maydica 37:29-39.