1. Professor, Kimberly Research Center, Univ. of Idaho, Kimberly, ID 83341.
2. Associate Professor, Univ. of Miyazaki, 1-1, Gakuen Kibanadai-Nishi, Miyazaki 889-2192, Japan.
3. Visiting Professor, Kimberly Research Center, Univ. of Idaho, Kimberly, ID 83341.