Acta Ornithologica, 2001 Staff Author(s) Citation Siriwardena, G.M., Freeman, S.N., & Crick, H.Q.P. 2001. The decline of the Bullfinch Pyrrhula pyrrhula in Britain: is the mechanism known?. Acta Ornithologica 36: 152. Staff author(s) Gavin Siriwardena
