Wiersma, G B <br/><br/>
Pesticide residues in onions and soil--1969.  [electronic resource] 

 -  Pesticides monitoring journal  Mar 1972 
 - 345-7 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0031-6156 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chromatography, Gas<br/>Chromatography, Thin Layer<br/>DDT--analysis<br/>Dichlorodiphenyl Dichloroethylene--analysis<br/>Dichlorodiphenyldichloroethane--analysis<br/>Herbicides--analysis<br/>Insecticides--analysis<br/>Organophosphorus Compounds<br/>Pesticide Residues--analysis<br/>Photometry<br/>Soil--analysis<br/>United States<br/>Vegetables--analysis