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DD Morrall

Webster, J.R., P.J. Mulholland, J.L. Tank, H.M. Valett, Walter K. Dodds, B.J. Peterson, W.B. Bowden, et al. 2003. “Factors Affecting Ammonium Uptake In Streams – An Inter-Biome Perspective”. Freshwater Biology 48 (8): 1329-1352. doi:10.1046/j.1365-2427.2003.01094.x.
Peterson, B.J., WM Wollheim, P.J. Mulholland, J.R. Webster, J.L. Meyer, J.L. Tank, E. Marti, et al. 2001. “Control Of Nitrogen Export From Watersheds By Headwater Streams”. Science 292 (5514): 86-90. doi:10.1126/science.1056874.