Clark, Colin,  1905-1989. <br/><br/>
The economics of subsistence agriculture / 
by Colin Clark and Margaret Haswell. 
 - 4th ed. 
 - London :  New York :  Macmillan ;  St. Martin's P.,  1970. 
 - xiv, 267 p. :  ill. ;  22 cm. 
<br/><br/>Bibliography: p. 245-257. 
<br/><br/><label>ISBN: </label>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture--Economic aspects.
<br/><br/><label>Dewey Class. No.: </label>338.1  / CLE 1970