Year book 1922 : Perfegro field, flower and vegetable seeds - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rocky Mountain Seed, 1922)

Year book 1923 : Perfegro field-flower and vegetable seeds - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rocky Mountain Seed Co, 1923)

Year book 1926 : Perfegro field-flower and vegetable seeds - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rocky Mountain Seed Co, 1926)

Year book : 1927 [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rochelle Seed Company, 1927)

Year book : 1927 [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (State Nursery and Seed Co, 1927)

Year book 1927 : Perfegro brand vegetable, field and flower seeds - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rocky Mountain Seed Co, 1927)

Year book : 1928 [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (State Nursery and Seed Company, 1928)

Year book 1928 : Perfegro brand vegetable, field and flower seeds - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rocky Mountain Seed Company, 1928)

Year book 1930 : Perfegro brand vegetable, field and flower seeds for market gardeners and home planters - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rocky Mountain Seed Company, 1930)

Year book 1932 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rocky Mountain Seed Co, 1932)

Year book 1933 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rocky Mountain Seed Co, 1933)

Year book 1937 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (State Nursery & Seed Co, 1937)

Year book for 1934 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (State Nursery & Seed Co, 1934)

Year book for 1935 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (State Nursery & Seed Co, 1935)

Year book for 1936 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (State Nursery & Seed Co, 1936)

Year book of 1931 : Perfegro brand vegetable, farm and flower seeds for critical planters - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rocky Mountain Seed Co, 1931)

Yokohama Nursery Co., Inc offers the following hardy tree seeds - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Yokohama Nursery Co., Inc, 1949)

The Yokohama Nursery Co., Ltd - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Yokohama Nursery Co., Ltd, 1898)

Yopp's 26th annual seed catalog and garden guide, 1936 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Yopp Seed Co., Inc, 1936)

Yopp's 27th annual seed catalog and garden guide, 1937 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Yopp Seed Co., Inc, 1937)

Yopp's 28th annual seed catalog and garden guide, 1938 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Yopp Seed Co., Inc, 1938)

Yopp's 29th annual seed catalog and garden guide, 1939 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Yopp Seed Co., Inc, 1939)

You can grow them with penny packet seeds in your own home or school garden - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Children's Flower Mission, 1925)

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

Your blue book of gardening : 1926 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Winsel-Gibbs Seed Company, 1926)

Your garden favorites - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Burnett-Seedsmen Inc, 1945)

Your garden needs Barteldes seeds : our 74th year, 1941 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Barteldes Seed Co, 1941)

yun nan zhi wu zhi - Wu, Zhengyi. (ke xue chu ban she, 2006)

zai pei zhi wu ming lu - Zhongguo ke xue yuan. Zhi wu yan jiu suo (zhong guo ke xue yuan)

Zeitschrift für Pflanzenkrankheiten (E. Ulmer, 1891)

Zeitschrift für wissenschaftliche Insektenbiologie (s.n, 1907)

Zeitschrift für wissenschaftliche Mikroskopie und mikroskopische Technik (S. Hirzel [etc.], 1909)

zhe jiang tian mu shan yao yong zhi wu zhi 浙江天目山药用植物志 - Zhejiang ren min chu ban she 浙江人民出版社 (zhe jiang ren min chu ban she chu ban浙江人民出版社出版, 1965)

zhe jiang zhong yao shou ce 浙江中药手册 - Zhejiang Sheng (China). Wei sheng ting. (浙江人民出版社出版, 1959)

zhi wu fen lei xue jian bian - Hu, Xiansu (gao deng jiao yu chu ban she)

zhong guo dong bei zhi wu jian suo biao - dong bei nong lin xue yuan zhi wu jiao yan zu he bian (dong bei nong lin xue yuan zhi wu jiao yan zu)

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 guo jing ji zhi wu bing yuan mu lu - Dai, Fanglan, Xiang Wangnian & Zheng Ruyong (ke xue chu ban she, 1958)

zhong guo jing nei suan xing tu gai zhi tu he yan jian tu de zhi shi zhi wu - Hou, Xueyu (zhong guo ke xue yuan)

zhong guo si yong zhi wu zhi 中国饲用植物志 - Zhongguo si yong zhi wu zhi bian ji wei yuan hui中国饲用植物志编辑委员会 (nong ye chu ban she农业出版社, 1992)

zhong guo si yong zhi wu zhi 中国饲用植物志 - Zhongguo si yong zhi wu zhi bian ji wei yuan hui中国饲用植物志编辑委员会 (nong ye chu ban she农业出版社, 1991)

zhong guo si yong zhi wu zhi 中国饲用植物志 - Zhongguo si yong zhi wu zhi bian ji wei yuan hui中国饲用植物志编辑委员会 (nong ye chu ban she农业出版社, 1987)

zhong guo zao zhi zhi wu yuan liao zhi - Sun, Baoming & Li Zhongkai (qing gong ye chu ban she, 1959)

zhong guo zhi wu ke shu jian suo biao - Zhongguo zhi wu yan jiu suo bian (zhong guo ke xue yuan zhi wu yan jiu suo, 1953)

zhong guo zhi wu xue wen xian ping lun - Bretschneider, E. (Emil), 1833 -1901 (shang wu yin shu guan, 1957)

zhong guo zhong zi zhi wu fen ke jian suo biao fu qiang wei ke dou ke ji he ben ke deng fen shu jian suo biao - Geng, Yi Li (zhong guo ke xue tu shu yi qi gong si, 1951)

zhong guo zhong zi zhi wu fen lei xue - zheng mian (zhong guo ke xue tu shu yi qi gong si, 1956)

zhong guo zhong zi zhi wu ke shu ci dian - Hou, Kuanzhao 侯宽昭 (ke xue chu ban she, 1982)

zhong guo zhu yao zhi wu tu shuo dou ke - Zhongguo ke xue yuan. Zhi wu yan jiu suo (ke xue chu ban she, 1955)

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

zhong zi zhi wu shu zhong jian suo biao . shang ce 种子植物属种检索表.上册 - Shanghai shi fan xue yuan hua dong shi fan da xue 上海师范学院, 华东师范大学 (ren min jiao yu chu ban she 人民教育出版社, 1980)

Zhongguo yao yong zhi wu zhi 中国药用植物志 - Pei, Jian 裴鑑 (zhong guo ke xue yuan zhi wu yan jiu suo中国科学院植物研究所)

zhu xi zhi wu zhi - Gan, Qiliang (hu bei chang jiang chu ban ji tuan hu bei ke xue ji shu chu ban she, 2005)

Zoologisches Zentralblatt (W. Engelmann, 1910)