Sheffield, J. H., & Joly, J. R. (1784). Observations on the commerce of the American states.: By John Lord Sheffield. With an appendix; containing tables of the imports and exports of Great Britain to and from all parts, from 1700 to 1783. .. (The sixth edition, enlarged. With a complete index to the whole.). Printed for J. Debrett.

Sheffield, John Holroyd, and Jaspar Robert Joly. Observations on the Commerce of the American States.: By John Lord Sheffield. With an Appendix; Containing Tables of the Imports and Exports of Great Britain to and from All Parts, from 1700 to 1783. .. The sixth edition, enlarged. With a complete index to the whole. Printed for J. Debrett, 1784.