https://www.bto.org/our-work/science/publications/papers/raptors-field-guide-survey-and-monitoring-superceded
Raptors: a field guide to survey and monitoring. [Superceded by 2nd edn 2009]
Raptors: a field guide to survey and monitoring. [Superceded by 2nd edn 2009]
Citation
Hardey, J., Crick, H., Wernham, C., Riley, H., Etheridge, B. & Thompson, D. 2006. Raptors: a field guide to survey and monitoring. [Superceded by 2nd edn 2009]. The Stationery Office, Edinburgh
