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West Coast botany : an analytical key to the flora of the Pacific Coast in which are described over eighteen hundred species of flowering plants growing west of the Sierra Nevada and Cascade crests, from San Diego to Puget Sound - Rattan, Volney, 1840 -1915 (Whitaker & Ray, 1898)

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Wholesale trade list : Eastern Nurseries spring, 1912 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Henry S. Dawson, 1912)

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Wild flowers every child should know - Stack, Frederic William, 1871 - (Grosset & Dunlap, 1909)

Wild flowers every child should know : arranged according to color, with reliable descriptions of the more common species of the United States and Canada - Stack, Frederic William, 1871 - (Grosset & Dunlap, 1909)

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Wissenschaftliche Ergebnisse der Schwedischen Südpolar-Expedition, 1901-1903 - Nordenskjöld, Otto, 1869 -1928 (Lithographisches Institut des Generalstabs, 1905)

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Zeitschrift für wissenschaftliche Insektenbiologie (s.n, 1915)

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Zeitschrift für wissenschaftliche Insektenbiologie (s.n, 1905)

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Ziva : casopis pro biologickou práci - Akademie ved Ceské republiky (Academia, 1859)

Zoe:a biological journal (Zoe Publishing Co, 1891)

Zoe:a biological journal (Zoe Publishing Co, 1892)

Zoologica (Erwin Nägele, 1911)

The Zoologist : a monthly journal of natural history (1860)

The Zoologist : a monthly journal of natural history (1865)

Zur Flora des Feuerlandes, floristische Beobachtungen über Gefässpflanzen, gesammelt in den Jahren 1902 und 1903 - Skottsberg, Carl, 1880 -1963 (Lithographisches Institut des Generalstabs, 1906)