Dark clay soils of tropical and subtropical regions / 
edited by R. Dudal, under the general direction of D. Luis Bramao. 
 - Rome :  FAO of the United Nations,  1965. 
 - x, 161 p. : ill. 
 - FAO agricultural development paper ; no. 83 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Clay soils--Tropics.<br/>Clay--Tropics.<br/>Soils--Tropics.