Clark Colin Economics of subsistence agriculture Clark Colin; Haswell Margaret - 4th - London Macmillan UK 1970 - xiii, 267p. Bibliography P 245-57, Appendix P 240-44 cm. .Macmillan student editions ISBN: 333116585 Source: General Book Subjects--Topical Terms: Agricultural Industry Dewey Class. No.: X9(J), K4; L0