Participatory methods for natural resource learning and action. Seiter, S., and R.D William. Systems thinking and practice for alley cropping research. Pgs 167-176, Kluwer, Netherlands. Seiter, S., and R.D. William.
Farmers design integrated crop-tree systems.
Sustainable Farming Systems. Seiter, S., and R.D. William. Applying systems thinking and practice to agricultural research. Greenbook ' 96, Energy and Sustainable Agriculture Program, Minnesota Department of Agriculture pages 6-7. Seiter, S., E.R. Ingham, and R.D. William. 1999.