Clark, Colin, 1905- <br/><br/>
The Economics of subsistence agriculture 
by Colin Clark and Margaret Haswell 
 - 4th ed. 
 - London  MacMillan  1970 
 - xiii, 267 p. : ill. ; 22 cm. 
<br/><br/>Bibliography: p. 245-257. 
<br/><br/><label>ISBN: </label>5333116585 
<br/><br/><label>LCCN: </label>75-121341 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture--Economic aspects