Hock, W.K. <br/><br/>
Using pesticides safely / 
by W.K. Hock 
 - Pennsylvania :   The Pennsylvania State University 
 - 12 p. 
 - Special circular; 296 .
<br/><br/><label>LCCN: </label>205178 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pesticidas -- análisis<br/>Pesticidas -- medidas de seguridad