Leopold, A. 1., Callicott, J. B. 1., Freyfogle, E. T., Sanders, S. R., Temple, S. A., & Rorer, A. (1999). For the health of the land: Previously unpublished essays and other writings. Washington, D.C.: Island.

Leopold, Aldo 1886-1948, John Baird 1941- Callicott, Eric T. Freyfogle, Scott Russell Sanders, Santley A. Temple, and Abigail Rorer. For the Health of the Land: Previously Unpublished Essays and Other Writings. Washington, D.C.: Island, 1999.

Leopold, Aldo 1886-1948, et al. For the Health of the Land: Previously Unpublished Essays and Other Writings. Washington, D.C.: Island, 1999.