John Walter Thomson
John Walter Thomson Jr. (1913–2009) was a Scottish-born American botanist and lichenologist, sometimes referred to as the "Dean of North American Lichens". Provided by Wikipedia-
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4by Stephen S. Talbot, Sandra Looman Talbot, John W. Thomson, Fred J. A. Daniëls, Wilfred B. SchofieldContributors: “...John W. Thomson...”
Published 2002
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