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Photo Credits & Sources
Page 10, Don W. Fawcett/Photo Researchers, Inc.
Page 16, A. Barrington Brown/Photo Researchers, Inc.
Page 23, Biophoto Associates/Photo Researchers, Inc.
Page 39, James Holmes, Cellmark Diagnostics/SPL/Photo Researchers, Inc.
Page 42, Prof. Stanley Cohen/SPL/Photo Researchers, Inc.
Page 51, Prof. K. Peter Pauls, Dept. of Crop Science, University of Guelph
Page 111, United States Department of Agriculture (USDA)
Page 113, 140, 183, Harry Turner, National Research Council of Canada (NRC)
Page 117, M.A. Hulme, T.J. Ennis, and A. Lavallée, Forestry Chronicle
Page 119, Monsanto
Page 124, Ontario Ministry of Agriculture and Food
Page 144, Boojum Technologies Ltd.
Page 176, Dr. R.H. Devlin, Canadian Dept. Fisheries and Oceans