Mutsaers, H.J. W. <br/><br/>
A field guide for on-farm experimentation / 

 - Ibadan, Nigeria :  International Institute of Tropical Agriculture,  1997 
<br/><br/><label>ISBN: </label>9781311258 
<br/><br/><label>LC Class. No.: </label>S540.O53.F53 1997