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New Algal Species Records for the Great Smoky Mountains National Park, U.S.A., with an Annotated Checklist of all Reported Algal Species for the Park." Algological Studies 3 (2004): 17-44.
"Epilithic Aerial Algae of Great Smoky Mountains National Park." Biologia 58, no. 4 (2003): 603-615.
"Latest Adventures of the Algal TWIG." ATBI Quarterly 2, no. 4 (2001): 4.
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