Severns, William H.  1888-1956. <br/><br/>
Steam, air and gas power / 
William H. Severns and Howard Edward Degler. 
 - 4th ed. 
 - New York,  J. Wiley,  1948. 
 - 509 p.:  ill.;  23. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Steam engineering.<br/>Internal combustion engines.<br/>Compressed air.<br/>Pumping machinery.
<br/><br/><label>Dewey Class. No.: </label>621.1  / SES 1948