Alcock, Ralph <br/><br/>
Tractor-implement systems 
Ralph Alcock 
 - Westport  Avi Publishing Co.Inc.  1986 
 - 161 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographies and index 
<br/><br/><label>ISBN: </label>1087055527 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Farm tractors<br/>Agricultural implements