Leffingwell, Randy,  1948- <br/><br/>
The American Farm Tractor:  A History of the Classic Tractor 
text and photography by Randy Leffingwell. 
 - Osceola, WI, USA :  Motorbooks International,  1991. 
 - 191 p. :  ill. (some col.) ;  26 cm. 
<br/><br/>Includes bibliographical references (p. [192]) and index. 
<br/><br/><label>ISBN: </label>0879385324  $29.95 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Farm tractors--History--United States<br/>Farm tractors--Pictorial works--United States
<br/><br/><label>LC Class. No.: </label>S711  / .L34 1991 
<br/><br/><label>Dewey Class. No.: </label>631.3/72/0973