Johnson, L C <br/><br/>
The Grand-Gulf Formation.  [electronic resource] 

 -  Science (New York, N.Y.)  Sep 1892 
 - 151 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0036-8075 
<br/><br/><label>Standard No.: </label>10.1126/science.ns-20.501.151-a  doi