Grigg David Dynamics of agricultural change The historical e - London Hutchinson UK 1982 - 260p. Bib p 230-55. cm. ISBN: 0091477905 Pd 12.95 Source: 464dt, 30/12/1985, SBD General Book Subjects--Topical Terms: Agricultural Industry Dewey Class. No.: X9(J)OgF, M2