%0 Generic %D 1998 %T Effects of carbon dioxide and nitrogen enrichment on a plantinsect interaction: the quality of Calluna vulgaris as a host for Operophtera brumata %A Kerslake, J.E. %A Woodin, S.J. %A Hartley, S.E. %B New Phytologist %V 140 %P 43-53 %G eng