The year book for 1938 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Weston Nurseries, 1938)

The year book for 1940 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Weston Nurseries, 1940)

The year book for 1944 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Weston Nurseries, 1944)

The year book for 1945 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Weston Nurseries, 1945)

The Year book for 1950 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Weston Nurseries, Inc, 1950)

The Year book for 1951 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Weston Nurseries, Inc, 1951)

The Year book for 1952 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Weston Nurseries, Inc, 1952)

The Year book for 1953 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Weston Nurseries, Inc, 1953)

The Year book for 1954 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Weston Nurseries, Inc, 1954)

The Year book for 1955 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Weston Nurseries, Inc, 1955)

The Year book for 1956 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Weston Nurseries, Inc, 1956)

The Year book for 1957 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Weston Nurseries, Inc, 1957)

Year book of Stark Bro's Nurseries & Orchards Co - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Stark Bro's Nurseries & Orchards Co, 1913)

Yearbook of agriculture - United States. Department of Agriculture. (U.S. Govt. Print. Off, 1896)

Yearbook of agriculture - United States. Department of Agriculture. (U.S. Govt. Print. Off, 1903)

Yearbook of agriculture - United States. Department of Agriculture. (U.S. Govt. Print. Off, 1909)

you hua zhi wu ke zhi shuang zi ye zhi wu - Hutchinson, J. (John) 1884 -1972 (shang wu yin shu guan)

Your bargain book of fruits and flowers, spring 1947 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Whitten Nurseries, 1947)

yun nan zhi wu zhi - Wu, Zhengyi. (ke xue chu ban she, 1991)

Yunnan zhong zi zhi wu ming lu - Zhongguo ke xue yuan. Kunming zhi wu yan jiu suo. (Yunnan ren min chu ban she, 1984)

Zeitschrift für Pflanzenzüchtung - Bayerischer Saatzuchtverein. (Paul Parey, 1921)

Zeitschrift für Botanik (1920)

Zeitschrift für die gesammten Naturwissenschaft - Naturwissenschaftlicher Verein für Sachsen und Thüringen in Halle. (Wiegandt, Hempel & Parey, 1860)

Zeitschrift für Pflanzenkrankheiten (E. Ulmer, 1891)

Zeitschrift für Pflanzenkrankheiten (E. Ulmer, 1921)

zhi wu di li xue zhi wu sheng tai xue he di zhi wu xue de fa zhan - Li, Jitong (ke xue chu ban she)

Zoe:a biological journal (Zoe Publishing Co, 1901)

Zoography; or, The beauties of nature displayed. In select descriptions from the animal, and vegetable, with additions from the mineral kingdom. Systematical arranged - Daniell, William, 1769 -1837 (Printed for Cadell and Davies, 1807)

The Zoologist : a monthly journal of natural history (1863)