Jones, Fred R. <br/><br/>
Farm gas engines and tractors / 
Fred R. Jones 
 - 2nd ed. 
 - New York :  McGraw-Hill Book,  1938 
 - 486 p. ;  23 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Gas and oil engines<br/>Traction--engines<br/>Farm engines