author = { Berry P.M. AND Sylvester-Bradley, R. AND Philipps, L. AND Hatch, D.J. AND Cuttle, S.P. AND Rayns, F.W. AND Gosling, P. },

title = { Is the productivity of organic farms restricted by the supply of available nitrogen? },

publisher = {Wiley},

isbn = {1475-2743},

isbn = {0266-0032},

year = {2002},

url = { http://slubdd.de/katalog?TN_libero_mab2 }