R.J. Wagenet
Groffman, Peter M., and R.J. Wagenet. 1994. “Advances And Pitfalls In Translating Information Across Scales”. Proc. 15Th World Congr. Soil Sci. 6a: 662-681.
Batie, S., J.W. Gilliam, Peter M. Groffman, G.R. Hallberg, N.D. Hamilton, W.E. Larson, L.K. Lee, et al. 1993. Soil And Water Quality: An Agenda For Agriculture. National Academy Press, Washington, D. C.