Weeds used in medicine - Henkel, Alice, 1869 -1916 (U.S. G.P.O, 1917)

Weobecný rostlinopis ili Popsani rostlin we welikém ohledu uitenych a kodliwých - Presl, Jan Svatopluk, 1791 -1849 (W kommissi u Kronbergra a Riwnáe, 1846)

The West-American scientist - Orcutt, Charles Russell, 1864 -1929 (C.R. Orcutt, 1890)

The West-American scientist - Orcutt, Charles Russell, 1864 -1929 (C.R. Orcutt, 1891)

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Who's who among the wild flowers - Beecroft, W. I. (Willey Ingraham), 1870 - (Moffat, Yard, 1910)

Wiener entomologische Zeitung (E. Reitter [etc.], 1915)

Wild flowers east of the Rockies - Reed, Chester A. (Chester Albert), 1876 -1912 (Reed, 1910)

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

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