Middleton, William <br/><br/>
A sawfly injurious to young pines  / 
William Middleton 
 - Washington  :   Department of Agriculture 
 - 11 p. 
 - EUA. Dept. of agriculture Farmers' bull.; 1259 .
<br/><br/><label>LCCN: </label>203843 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Tenthredinidae  Pináceas -- Plagas