Howell, David <br/><br/>
An introduction to "the future of natural gas" 

 - U. S. Geological Survey Professional paper, 1570 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Energie<br/>Gaz naturel<br/>Environnement<br/>Economie d'énergie<br/>Ressource naturelle