Yothers, M. A. <br/><br/>
Tree hoppers and their control in the orchards of the pacific northwest  / 
by M. A. Yothers 
 - Washington  :   Department of Agriculture 
 - 15 p. 
 - EUA. Dep. of Agr. Circular; 106 .
<br/><br/><label>LCCN: </label>202680 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chapulines  Control de plagas