Johnson, Leon J. <br/><br/>
Introductory soil science  a study guide and laboratory manual 
Leon J. Johnson 
 - New York  Macmillan  1979 
 - xiii, 289 p. : ill. ; 28 cm. 
<br/><br/><label>ISBN: </label>0023611200 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil science--Laboratory manuals<br/>Soil science--Study and teaching