Freeman, A E <br/><br/>
Transformation of rat and hamster embryo cells by extracts of city smog.  [electronic resource] 

 -  Proceedings of the National Academy of Sciences of the United States of America  Feb 1971 
 - 445-9 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0027-8424 
<br/><br/><label>Standard No.: </label>10.1073/pnas.68.2.445  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Air Pollution<br/>Benzopyrenes--pharmacology<br/>Cell Line<br/>Cell Transformation, Neoplastic--drug effects