Observations on the tillage of the earth, and on the theory of instruments adapted to this end. By James Black, Of Morden, in Surry.

London : printed for P. Elmsly, in the Strand, M.DCC.LXXVII. [1777]

[4],39,[1]p.,plates : ill. ; 40.

ESTC T56649

Electronic reproduction. Farmington Hills, Mich. : Thomson Gale, 2003. (Eighteenth century collections online). Available via the World Wide Web. Access limited by licensing agreements.