1. Think little;Berry,1970
2. Berry, W. 1999. In distrust of movements. The Land Report 65 (Fall):3–7. The Land Institute, Salina, KS.
3. Berry, W. and N. Wirzba. 2002. A native hill. P3–31. The Art of the Commonplace: The Agrarian Essays of Wendell Berry. Shoemaker and Hoard, Washington, D.C. 330 pp.
4. Science and Human Values;Bronowski,1956
5. The Ascent of Man;Bronowski,1973