Applications of Systems Approaches at the Field Level: Volume 2: Proceedings of the Second International Symposium on Systems Approaches for Agricultural Development, held at IRRI, Los Banos, Philippines, 6-8 December 1995 by M.J. Kropff, B.A.M Bouman, P.S. Teng, H.H. Van Laar, Johan Bouma, John W. Jones, P.K. Aggarwal (Paperback, 2010)