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Exell, Arthur Wallis: Catalogue of the Vascular Plants of S. Tomé (With Principe and Annobon). 1944. 27 figs. 3 maps. XI, 428 p. gr8vo. Cloth. - Plus 'Supplement to the Catalogue of the Vascular Plants of S. Tomé (with Principe and Annobon). 1956. 3 figs. 58 p. gr8vo. Paper bd. (99639) 87.74
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