1 “... on Education and Training in Agroforestry held at the University of Florida, Gainesville, USA in December, 1988...”

2 “... Sciences at the University of Florida, and was awarded, with Eugene Odum, the 1987 Crafoord Prize...”

3 “... systems.  Robert D. Holt, Eminent Scholar and Arthur R. Marshall Jr. Chair in Ecology, University...”