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Botanical research and management in Galapagos - Lawesson, J E (Missouri Botanical Garden, 1990)

Botanical research and management in Galapagos - Lawesson, J E (Missouri Botanical Garden, 1990)

Botanical research and management in Galapagos - Lawesson, J E (Missouri Botanical Garden, 1990)

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Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1986)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1986)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1991)

The World List of Threatened Trees (1998)

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World Plant Conservation Bibliography (1990)