The use of gas for space-heating and air-conditioning purpose. 

 - New York :  UN ,  1968 
 - vi, 74+7p. :  ill. ;  32 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Gas industry
<br/><br/><label>Dewey Class. No.: </label>665.7  / ECE-9