Assessment of nitrogen deposition effects and empirical critical loads of nitrogen for ecoregions of the United StatesLinda H. Pardo, M. J. Robin-Abbott, Charles T. Driscoll · First published 2011Open the Tome
Approaches for estimating critical loads of nitrogen and sulfur deposition for forest ecosystems on U.S. federal landsLinda H. Pardo · First published 2010Open the Tome
