Comber, Norman M. <br/><br/>
An introduction to agricultural chemistry / 
Norman M. Comber 
 - 3rd ed. 
 - London :  Edward Arnold,  1964 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural engineering
<br/><br/><label>Dewey Class. No.: </label>630.24  / COM