Tivy, Joy <br/><br/>
Agricultural ecology 
Joy Tivy 
 - Harlow  Longman  1990. 
 - 288 p.  ill.,  23 cm. 
<br/><br/>Bibliography: p. 261-280 
<br/><br/><label>ISBN: </label>0582301637 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural ecology