TY - Generic T1 - Effects of enhanced nitrogen deposition and phosphorus limitation on nitrogen budgets of semi-natural grasslands Y1 - 2003 A1 - Phoenix, G.K. A1 - Booth, R.E. A1 - Leake, J.R. A1 - Read, D.J. A1 - Grime, J.P. A1 - Lee, J.A. JF - Global Change Biology VL - 9 ER -