Empirical critical loads for nitrogen for ecoregions of the United States
L.H. Pardo
M.J. Robin-Abbott
M.E. Fenn
C.L. Goodale
L.H. Geiser
C.T. Driscoll
E.B. Allen
J.S. Barron
R. Bobbink
W.D. Bowman
C.M. Clark
B. Emmett
F.S. Gilliam
T.L. Greaver
S.J. Hall
E.A. Lilleskov
L. Liu
J.A. Lynch
K.J. Nadelhoffer
S.S. Perakis
J.L. Stoddard
K.C. Weathers
R.L. Dennis
In: W. de Vries, J-P. Hettelingh & M. Posch (eds) Critical Loads and Dynamic Risk Assessments: Nitrogen, Acidity and Metals in Terrestrial and Aquatic Ecosystems. Springer, Dordrecht, Netherlands (2015): 129-169.