Smith, J. Macgregor. <br/><br/>
Some power problems of the farm. 

 - 3 ed. 
 - (s.l.) :  University of Alberta, College of Agriculture,  1938. 
 - 38 p. :  : ilus. 
 - Bulletin  ; 17 .
 - Bulletin  ; 17 .
<br/><br/><label>LCCN: </label>58086 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mecanización agrícola.