Bent Martin. <br/><br/>
Livestock Productivity Enhancers : An Economic Assessment 

 - Wallingford.  CAB International.  1993 
 - iv, 162p. 
<br/><br/><label>ISBN: </label>0 85198 800 8 
<br/><br/><label>Dewey Class. No.: </label>636.0072