Observations on the disease in turnips, termed in Holderness "Fingers and Toes" in a letter to John Broadley, Esq. read to the Holderness Agriculture Society, December 23, 1811, and printed at their request - Spence, William 1783-1860 ([s.n.], 1812)
Goldsmiths'-Kress no. 20468. - OCLC, 16836836. - Reproduction of original from Goldsmiths' Library, University of London