A field guide for on-farm experimentation / 
H.J.W. Mutsaers ... [et al.]. 
 - Ibadan, Nigeria :  International Institute of Tropical Agriculture,  c1997. 
 - xv, 235 p. :  ill., maps ; 
<br/><br/> "August 1997." 
<br/><br/><label>ISBN: </label>9781311258 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture--Research--On-farm.<br/>Agriculture--Research--On-farm.
<br/><br/><label>LC Class. No.: </label>S540.O53  / F54 1997