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The Western Australian Naturalist - Western Australian Naturalists' Club (Western Australian Naturalists' Club, 1988)

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Wild flowers of New York - House, Homer D. (Homer Doliver), 1878 -1949 (University of the State of New York, 1918)

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xi an zhi wu zhi - Xie, Yintang, Wang Mali & Zhao Guifang (shan xi ke xue ji shu chu ban she, 2007)