Ecological survey of the Spey Valley birch woods, 1973 - Bunce, R.G.H.; Barr, C.J.; Shaw, M.W.; Bunce, F.; Bassett, P.; Quarmby, S.; Robertson, S.M.C.; Bowen, W.J.A.; Morris, D.; Millar, A.; Brown, A.H.F.; Horrill, A.D.; et al. (NERC Environmental Information Data Centre, 2017)