D.R Heldman <br/><br/>
Agricultural engineering subject matter classification 

 - Michigan  American Society of Agricultural Engineers 
 - 16p 
<br/><br/>D.R Heldman; J.A. Wilson; C.W Hall & C.B. Richey: Agricultural engineering subject matter classification.  Michigan.  American Society of Agricultural Engineers,--(631.1012HEL)   
<br/><br/><br/>ENGLISH 
<br/><br/><label>Dewey Class. No.: </label>631.1012  / ASAE