Thornton, D. <br/><br/>
A soil conservation study in the United States of America /  
D. Th ornton. 
 - Dar es Salaam :    Government Printer,    1950. 
 - 44 p. ;    25 cm. 
 - Pamphlet ;    no. 46 .
<br/><br/><label>Subjects--Topical Terms: </label><br/> Soil conservation -- Africa
<br/><br/><label>Gov. Doc. Class. No.: </label>G EAT A31 (08) 7/46