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Diana Polhill
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Flora of Tropical East Africa
Diana Polhill · Balogh Scientific Books
262 sayfa · 1970
Botany / Botany, africa / Plants / Gazetteers
East African Plant Collectors
Diana Polhill, Roger Polhill · Kew Publishing
520 sayfa · 2015
Plants, pictorial works / Botany, africa / Plant collectors / Biography / Botany