Clark, Colin.
The economics of subsistence agriculture / by Colin Clark and Margaret Haswell. - 4th ed. - London : Macmillan, 1970. - xiv, 267 p. : ill.
0333116585
Agriculture--Economic aspects.
The economics of subsistence agriculture / by Colin Clark and Margaret Haswell. - 4th ed. - London : Macmillan, 1970. - xiv, 267 p. : ill.
0333116585
Agriculture--Economic aspects.