Lotkowski, Wladyslaw M. <br/><br/>
The soil /  
W.M. Lotkowski. 
 - Chicago :    Educational Methods,    1966. 
 - 123 p. :    ill., maps ;    22 cm. 
 - An EM Self-instructional program. .
<br/><br/>  "Answer mask" laid in 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Soil science
<br/><br/><label>Dewey Class. No.: </label>631.4077