Gilbert, E. H. <br/><br/>
Farming systems research  a critical appraisal 
E. H. Gilbert, D. W. Norman and  F. E. Winch 
 - Michigan  Michigan State University  1980 
 - 35p.  28cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Farming system research
<br/><br/><label>LC Class. No.: </label>ERB PAM S494.G542