An Introduction to the scientific study of the soil / 
W. N. Townsend. 
 - 5th ed. 
 - London :   E. Arnold,   1973. 
 - 209 p. :  ill. ;   23 cm. 
<br/><br/> First ed. to 4th ed. by Norman Mederson Comber. 
<br/><br/><label>ISBN: </label>0713124083 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil science.