Hallawell's annual garden book, 1933 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hallawell Seed Company, 1933)

Hallawell's annual garden book, 1934 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hallawell Seed Company, 1934)

Hallawell's annual seed catalog : 1926 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hallawell Seed Company, 1926)

Hallawell's annual seed catalog : 1927 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hallawell Seed Company, 1927)

Hallawell's annual seed catalog : 1928 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hallawell Seed Company, 1928)

Hallawell's for your garden, 1935 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hallawell Seed Company, 1935)

Hallawell's for your garden, 1936 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hallawell Seed Company, 1936)

Hallawell's for your garden, 1937 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hallawell Seed Company, 1937)

Hallawell's for your garden, 1939 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hallawell Seed Company, 1939)

Hallawell's for your garden, 1940 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hallawell Seed Company, 1940)

Hallawell's for your garden, 1941 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hallawell Seed Company, 1941)

Hallawell's, San Francisco : 1942 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hallawell Seed Company, 1942)

Hallawell's, San Francisco, 1943 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hallawell Seed Company, 1943)

Hamburger Garten- und Blumenzeitung (R. Kittler, 1875)

Hamburger Garten- und Blumenzeitung (R. Kittler, 1881)

Hamburger Garten- und Blumenzeitung (R. Kittler, 1885)

Hand-list of herbaceous plants cultivated in the Royal Botanic Gardens (Printed for H. M. Stationery Off. by Darling, 1902)

Handbok i Skandinaviens flora : innefattande sveriges och norges växter, till och med mossorna - Hartman, Carl Johan, 1790 -1849 (Z. Haeggström, 1864)

A handbook of British lepidoptera - Meyrick, Edward, 1854 -1938 (Maomillan, 1895)

Handbook of experiment station work - United States. Office of Experiment Stations. (Gov't print. off, 1893)

Handbook of flower pollination : based upon Hermann Müller's work ʻThe fertilisation of flowers by insectsʼ - Knuth, Paul, 1854 -1899 (Clarendon Press, 1906)

Handbook of flower pollination based upon Hermann Müller's work The fertilisation of flowers by insects - Knuth, Paul, 1854 -1899 (Clarendon press, 1906)

Handbook of flower pollination based upon Hermann Müller's work 'The fertilisation of flowers by insects' - Knuth, Paul, 1854 -1899 (Clarendon Press, 1906)

Handbook of flower pollination based upon Hermann Müller's work The fertilisation of flowers by insects - Knuth, Paul, 1854 -1899 (Clarendon press, 1909)