Walton, W. R. <br/><br/>
The hessian fly and how losses from it can be avoided  / 
by W. R. Walton and C. M. Packard 
 - Washington  :   Department of Agriculture 
 - 14 p. 
 - EUA. Dep. of Agri. Farmers' bull.; 1627 .
<br/><br/><label>LCCN: </label>203989 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Phytophaga destructor  Control de plagas