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Masami Fukuda
Institute of Low Temperature Science, Hokkaido University, Sapporo (Japan)
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Ben D. Kay
Department of Land Resources Science, University of Guelph, Guelph, Ontario (Canada)
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Hisao Izuta
Seiken Co. Ltd., Osaka (Japan)
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Marsha I. Sheppard
Atomic Energy of Canada Ltd., Pinewa, Manitoba (Canada)