The woods of the United States - Sargent, Charles Sprague, 1841 -1927 (D. Appleton and Co, 1885)

Woody plants in winter; a manual of common trees and shrubs in winter in the Northeastern United States and southeastern Canada - Ammons, Nelle P. 1889 - (Boxwood Press, 1958)

The woody plants of Kentucky - Garman, Harrison, 1858 - (Kentucky Agricultural Experiment Station of the State University, 1913)

The woody plants of Manhattan in their winter condition - Hitchcock, A. S. (Albert Spear), 1865 -1935 (Mercury Pub. House, 1893)

Work of the Northern Great Plains Field Station in 1923 - Stephens, John Morman, 1879 - (U.S. Dept. of Agriculture, 1925)

World's champion fruit trees & hardy ornamentals - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Stark Bro's Nurseries & Orchards Co, 1949)

World's champion fruit trees & hardy ornamentals - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Stark Bro's Nurseries & Orchards Co, 1947)

World's choicest nursery products for rock-gardens - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Bobbink & Atkins, 1916)

World treasures from Flowerland - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Paul J. Howard's Horticultural Establishment, 1935)

World treasures from Flowerland : 1937 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Paul J. Howard's Horticultural Establishment, 1937)

W.T. Hood & Company, Inc., "Old Dominion Nurseries, Richmond, Virginia - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (W.T. Hood & Co, 1944)

[Wyman's Framingham Nurseries materials] - Liberty Hyde Bailey Hortorium. Ethel Z. Bailey Horticultural Catalogue Collection.

[Wyman's Framingham Nurseries materials] - Liberty Hyde Bailey Hortorium. Ethel Z. Bailey Horticultural Catalogue Collection. (1914)

[Wyman's Framingham Nurseries materials] - Liberty Hyde Bailey Hortorium. Ethel Z. Bailey Horticultural Catalogue Collection. (1915)

[Wyman's Framingham Nurseries materials] - Liberty Hyde Bailey Hortorium. Ethel Z. Bailey Horticultural Catalogue Collection. (1918)

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

xin jiang sheng wu duo yang xing - Yuan, Guoying (xin jiang ke xue ji shu chu ban she, 2008)

Year book - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Winfield Nurseries, 1928)

Year book, 1927 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Farina Nursery Company, 1927)

Year book : spring, 1930 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Winfield Nurseries, 1930)

Yearbook of agriculture - United States. Department of Agriculture. (U.S. Govt. Print. Off, 1899)

Yearbook of agriculture - United States. Department of Agriculture. (U.S. Govt. Print. Off, 1902)

Yearbook of agriculture - United States. Department of Agriculture. (U.S. Govt. Print. Off, 1905)

Yearbook of the United States Department of Agriculture - United States. Department of Agriculture. (G.P.O, 1895)

[Youngers & Company materials] - Liberty Hyde Bailey Hortorium. Ethel Z. Bailey Horticultural Catalogue Collection. (Youngers & Co, 1912)

[Youngers & Company materials] - Liberty Hyde Bailey Hortorium. Ethel Z. Bailey Horticultural Catalogue Collection. (Youngers & Co, 1914)

Your 1919 catalog - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Maloney Bros & Wells Co, 1919)

Your ... catalog - Houstons' Nurseries. (Houstons' Nurseries, 1917)

yun nan zhi wu zhi - yun nan sheng zhi wu yan jiu suo (ke xue chu ban she, 1979)

Zeitschrift für Pflanzenkrankheiten (E. Ulmer, 1891)

zhong guo jin ji kun chong xue.zeng ding ban 中国经济昆虫学.增订版 - Li, Fengsun 李凤荪 (bian zhe zi kan 编者自刊, 1951)

zhong zi zhi wu ming cheng - Zhongguo ke xue yuan bian yi ju (zhong guo ke xue yuan, 1954)