Farm power and machinery management:  Laboratory manual and workbook/ 
Donnel hunt 
 - IOWA,  IOWA, State University Press,  1977. 
 - x, 365p.:  illustration 
<br/><br/><label>ISBN: </label>0813805805 
<br/><br/><label>Dewey Class. No.: </label>M 621.902 H911 1977