Coffey, George Nelson,  1875- <br/><br/>
A study of the soils of the United States. 

 - Washington,  Govt. Print. Off.,  1912. 
 - 114 p.  fold. map. (in pocket)  23 cm. 
<br/><br/>Bibliography: p. 100-114. 
<br/><br/><label>LCCN: </label>agr12002015  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soils--United States.
<br/><br/><label>LC Class. No.: </label>S591  / .A12 no. 85