Pettit, R. H <br/><br/>
Pest of apple and pear in Michigan  / 
R. H. Pettit, Ray Hutson 
 - Michigan  :   Agricultural Experiment Station 
 - 63 p. 
 - Michigan. Agr. Exp. Circular Bull; 137 .
<br/><br/><label>LCCN: </label>201804 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Manzana -- Plagas  Almendro -- Plagas