2009 Staff Author(s) Citation Hardey, J., Crick, H., Wernham, C., Riley, H., Etheridge, B. & Thompson, D. (Eds.). 2009. Raptors. A Field Guide for Surveys and Monitoring. [Superceded by 3rd Edition 2013]. The Stationery Office, Edinburgh Staff author(s) Chris Wernham
