The who recommended classification of pesticides by hazard and guidelines to classification, 2009 
World Health Organization 
 -  Geneva  World Health organization 
 - 78 p. 
<br/><br/><label>ISBN: </label>978-92-4-154796-3 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plaquicidas<br/>Sustancias peligrosas