Richardson, W. (1818). An essay on agriculture: Containing an introduction, in which the science of agriculture is pointed out, by a careful attention to the works of nature : also, the means of rendering barren soils luxuriantly productive, at a very moderate expense, and of beneficially employing the industrious and un-occupied poor : to which is added, a memoir ... on the nature and nutritive qualities of fiorin grass, with practical remarks on its abundant properties, and the best mode of cultivating that extraordinary vegetable / by William Richardson. Whitmore and Fenn.

Richardson, William. An Essay on Agriculture: Containing an Introduction, in Which the Science of Agriculture Is Pointed Out, by a Careful Attention to the Works of Nature : Also, the Means of Rendering Barren Soils Luxuriantly Productive, at a Very Moderate Expense, and of Beneficially Employing the Industrious and Un-occupied Poor : To Which Is Added, a Memoir ... on the Nature and Nutritive Qualities of Fiorin Grass, with Practical Remarks on Its Abundant Properties, and the Best Mode of Cultivating That Extraordinary Vegetable / by William Richardson. Whitmore and Fenn, 1818.