TY - Generic T1 - Comparison of techniques to increase Calluna vulgaris cover on heathland invaded by grasses in Breckland, south east England. Y1 - 2000 A1 - Britton, A.J. A1 - Marrs, R.H. A1 - Carey, P.D. A1 - Pakeman, R.J. JF - Biological Conservation VL - 95 ER -