April 16, 2024 Cook, E. M., R. A. Sponseller, N. B. Grimm and S. J. Hall. 2018. Mixed method approach to assess atmospheric nitrogen deposition in arid and semi-arid ecosystems. Environmental Pollution 239(Aug):617-630. Home » Cook, E. M., R. A. Sponseller, N. B. Grimm and S. J. Hall. 2018. Mixed method approach to assess atmospheric nitrogen deposition in arid and semi-arid ecosystems. Environmental Pollution 239(Aug):617-630.