Steward, D. R., Bruss, P. J., Yang, X., Staggenborg, S. A., Welch, S. M., & Apley, M. D. (2014). Reply to Butler et al: A sound hydrologic foundation for interdisciplinary studies of the High Plains Aquifer. National Academy of Sciences.

Steward, David R., Paul J. Bruss, Xiaoying Yang, Scott A. Staggenborg, Stephen M. Welch, and Michael D. Apley. Reply to Butler Et Al: A Sound Hydrologic Foundation for Interdisciplinary Studies of the High Plains Aquifer. National Academy of Sciences, 2014.

Steward, David R., et al. Reply to Butler Et Al: A Sound Hydrologic Foundation for Interdisciplinary Studies of the High Plains Aquifer. National Academy of Sciences, 2014.