RIFERIMENTI BIBLIOGRAFICI

• Peter Henderson & Co; Henry G. Gilbert Nursery and Seed Trade Catalog Collection, Everything for the garden, New York : Peter Henderson & Co. 1915.
• Thompson Robert, 1798-1869;,Watson William, 1858-1925,  The gardener's assistant; a practical and scientific exposition of the art of gardening in all its branches, London : The Gresham Publishing Co. , 1910.
• J. Manns & Co; Henry G. Gilbert Nursery and Seed Trade Catalog Collection,  Manns' superior seeds : 1935 market gardeners' catalogue, Baltimore, Md. : J. Manns, 1935.

text   

•  French, Charles, 1843, A handbook of destructive insects in Victoria, Robt. S. Brain, 1891.