Changing Agricultural Opportunities :   the role of farming systems approaches : proceedings of the 14th International Symposium on Sustainable Farming Systems, Colombo, Sri Lanka, 11-16 November 1996 / 
Editor: N.F.C. Ranaweera, H.P.M. Gunasena, Y.D.A. Senanayake. 
 - Peradeniya :  AFSA,   c1998. 
 - xv, 477 p. :  ill. ;  26 cm. 
<br/><br/><label>ISBN: </label>9558219002 
<br/><br/><label>Dewey Class. No.: </label>338.162  / CHA