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By A. Meharg
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By Gould, Stephen Jay
By Robert G. Laughlin (The Proctor and Gamble Company)
By Tom Petherick
By Robert Clark (Emeritus Professor of Zoology, Emeritus Professor of Zoology, University of Newcastle upon Tyne)
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By R. S. Blackburn (University of Leeds, UK)
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By Gosling, Peter J.
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By N.W.H. Allsop
By Michael B Abbott, W. Alan Price
By N.W.H Allsop
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