Origins of pest, parasite, disease and weed problems  the 18th Symposium of the British Ecological Society, Bangor, 12-14 April 1976 
edited by J. M. Cherrett and G. R. Sagar 
 - Oxford  Blackwell Scientific  1977 
 - x, 413 p.  ill  25 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pests<br/>Parasites<br/>Plant diseases<br/>Weeds
<br/><br/><label>Dewey Class. No.: </label>574.5  / 08 s