introduction by Joshua C. Dickinson ; sponsored by United States Agency for International Development, Bureau for Latin America and the Caribbean, Bureau of Science and Technology
sponsored by United States Agency for International Development and United States Department of Agriculture, Forest Service and Office of International Cooperation and Development in San Juan, Puerto Rico, September 22-27, 1986 / Julio C. Figueroa Colón (editor), Frank H. Wadsworth (associate editor), Susan Branham (associate editor)