Riverine inputs of nitrogen to the North Atlantic Ocean: Fluxes and human influences

Howarth, R. W. ; Billen, G. ; Swaney, D. ; Townsend, A. ; Jaworski, N. ; Lajtha, K. ; Downing, J. A. ; Elmgren, R. ; Caraco, N. ; Jordan, Thomas E. ; Berendse, F. ; Freney, J. ; Kudeyarov, V. ; Murdoch, P. ; Zhao-liang, Zhu. (1996). . Biogeochemistry, 35 , 75-139.