https://www.bto.org/our-work/science/publications/papers/indexing-winter-gull-numbers-great-britain-using-data
Indexing winter gull numbers in Great Britain using data from the 1953 to 2004 Winter Gull Roost Surveys
Indexing winter gull numbers in Great Britain using data from the 1953 to 2004 Winter Gull Roost Surveys
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
