Tivy, Joy. <br/><br/>
Agricultural ecology / 
Joy Tivy. 
 - Harlow, Essex, England :  Longman Scientific & Technical ;  1990. 
 - viii, 288 p. : 
<br/><br/><label>ISBN: </label>CSRD1728 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural ecology.
<br/><br/><label>Dewey Class. No.: </label>338.1  / Ag