Professor R.L.REID Water Falls Ithaka (July 1991)
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Utah State University Poisonous Plant Research Laboratory Dr.RALPHS Logan (September 1991)
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Oregon State University College of Veterinary Medicine Dr.Blythe Corvallis (September 1991)
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Pensylvania State University Professor R.L.REID and professor G.A.JUNG University Park (July 1991)
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Public Library New York (September 1991)
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Oklahoma State University Stillwater (September 1991)
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