TIRATSOO, E. N. <br/><br/>
NATURAL GAS 

 - SECOND EDITION 
 - Sin Pais  SCIENTIFIC PRESS LTD.  1972 
 - 400 
<br/><br/><label>LCCN: </label>19669 
<br/><br/><label>Dewey Class. No.: </label>665.7