Hinnah, Dennis <br/><br/>
Survey of natural helium occurrences 

 - U. S. Geological Survey Professional paper, 1570 .
<br/><br/>bibliogr. p. 707 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Gaz hélium<br/>Histoire<br/>Hélium<br/>Gaz
<br/><br/><label>Subjects--Index Terms: </label>Etats Unis