Principal Investigator
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(2002). Trends and fluctuations and underlying mechanisms in terrestrial orchid populations. Backhuys Publishers .
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(2002). [node:title] . Trends and fluctuations and underlying mechanisms in terrestrial orchid populations (117-131) Backhuys Publishers .
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(1999). [node:title] . U.S. Environmental Protection Agency, Western Division, National Health and Environmental Effects Laboratory .
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(1978). [node:title] . Freshwater wetlands: Ecological processes and management potential (3-20) Academic Press .