Origins of pest, parasite, disease and weed problems:   The 18th Symposium of the British Ecological Society, Bangor, 12-14 April 1976 
/ British Ecological Society 
 - London:   Blackwell Scientific Publication,   1977 
 - x, 413p. 
<br/><br/><label>ISBN: </label>0-632-00226-3 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture
<br/><br/><label>Subjects--Index Terms: </label>Ecological Economics 
<br/><br/><label>Universal Decimal Class. No.: </label>632   / L7