%0 Article %T Sources of nitrogen deposition in Federal Class I areas in the US %A Lee, H.M.; Henze, D.K.; Pardo, L.H.; Jacob, D.J.; Schichtel, B.A.; Paulot, F.; Travis, K. %8 2019-12-06 %R http://localhost/files/2f75r8676 %G http://id.loc.gov/vocabulary/iso639-2/eng %[ 2020-02-11 %9 Article %~ CU Scholar %W CU Boulder