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 C. T.  Driscoll, K. F.  Lambert, and K. C.  Weathers, ?Integrating science and policy: A case study of the Hubbard Brook Research Foundation Science Links Program?, BioScience, vol. 61, p. 791-801, 2011.\par \par  M. E.  Fenn, et al., ?Setting limits: Using air pollution thresholds to protect and restore U.S. ecosystems?, Issues in Ecology, no. 14, p. 1-21, 2011.\par \par  C. T.  Driscoll, et al., ?Acidic deposition in the northeastern United States: Sources and inputs, ecosystem effects and management strategies?, in J. M. Gunn, R. J. Steedman, and R. A. Ryder (eds.), 2004, p. 159-190.\par \par  C. T.  Driscoll, et al., ?Response to W. E. Sharpe's "Acid deposition explains sugar maple decline in the East"?, BioScience, vol. 52, p. 5-6, 2002.\par \par  G. E.  Likens and K. F.  Lambert, ?The importance of long-term data in addressing regional environmental issues?, Northeast. Natural, vol. 5, p. 127-136, 1998.\par \par }