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Filters: First Letter Of Title is N and Author is Petersen, Ronald H  [Clear All Filters]
2014
Petersen, Ronald H., and Karen H. Hughes. "New North American Species of Gymnopus." North American Fungi 9, no. 3 (2014): 1-22.
2001
Petersen, Ronald H.. New World Botany: Columbus to Darwin. Ruggell, Liechtenstein: A.R.G. Gantner Verlag, 2001.