Haawker, M.F.J. <br/><br/>
Horticultural Machinery 

 - 3rd ed. 
 - New York  Longman  1985 
 - X; 180p.  illustrations 
<br/><br/><label>ISBN: </label>0582408075 
<br/><br/><label>LC Class. No.: </label>S678.7  / .H31