Axtell, J. D. 1., Barnes-McConnell, P., Barreto, H., Berry, L. 1., & Bramble, B. (1991). Toward sustainability: A plan for collaborative research on agriculture and natural resource management. Washington, D.C.: National Academy Press.

Axtell, John D. 1934-2000, Patricia Barnes-McConnell, Hector Barreto, Leonard 1930- Berry, and Barbara Bramble. Toward Sustainability: A Plan for Collaborative Research On Agriculture and Natural Resource Management. Washington, D.C.: National Academy Press, 1991.

Axtell, John D. 1934-2000, et al. Toward Sustainability: A Plan for Collaborative Research On Agriculture and Natural Resource Management. Washington, D.C.: National Academy Press, 1991.