Peter Groffman

Long-term trends in ecological systems: a basis for understanding responses to global change
Peters, D., C.M. Laney, A.E. Lugo, S.L. Collins, Charles Driscoll, Peter Groffman, Morgan Grove, et al. 2012. Long-Term Trends in Ecological Systems: A Basis for Understanding Responses to Global Change. USDA Agricultural Research Service, Washington, D.C.
Soil and Water Quality: An Agenda for Agriculture
Batie, S., J.W. Gilliam, Peter 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.