https://www.bto.org/our-work/science/publications/papers/modelling-population-changes-using-data-different
Modelling population changes using data from different surveys: the Common Birds Census and the Breeding Bird Survey
Modelling population changes using data from different surveys: the Common Birds Census and the Breeding Bird Survey
Citation
Freeman, S.N., Noble,D.G., Newson, S.E. & Baillie, S.R. 2007. Modelling population changes using data from different surveys: the Common Birds Census and the Breeding Bird Survey. Bird Study 54: 72. doi:10.1080/00063650709461457