Bird Study, 2009 Staff Author(s) Citation Banks, A.N., Burton, N.H.K., Calladine, J.R. & Austin, G.E. 2009. Indexing winter gull numbers in Great Britain using data from the 1953 to 2004 Winter Gull Roost Surveys. Bird Study 56: 119. doi:10.1080/00063650802681623 Staff author(s) Graham Austin John Calladine Niall Burton
