Whitney, Milton. <br/><br/>
A study of crop yields and soil composition in relation to soil productivity. 
By Milton Whitney. 
 - Washington,  Govt. print. off.,  1909. 
 - 127 p. incl. tables, diagrs.  23 cm. 
<br/><br/><label>LCCN: </label>agr09002410  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soils--Analysis.
<br/><br/><label>LC Class. No.: </label>S591  / .A12 no. 57