Simoneit, B R <br/><br/>
Nitrogenous compounds of the Colorado Green River Formation oil shale: a preliminary analysis by mass spectrometry.  [electronic resource] 

 -  Nature  Apr 1970 
 - 75-6 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0028-0836 
<br/><br/><label>Standard No.: </label>10.1038/226075a0  doi