Bonn, W.G. <br/><br/>
Fire blight of apple and pear  / 
by W.G. Bonn and C.L. Hunter 
 - Ontario, Canada  :   Ministry of Agriculture and Food 
 - 4 p. 
<br/><br/><label>LCCN: </label>198994 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Manzana--Plagas <br/>Pera--Plagas