https://www.bto.org/our-work/science/publications/reports/research-reports/00523-barn-owl-monitoring-programme-report-2000-2007
The BTO Barn Owl Monitoring Programme: 2000-2007
The BTO Barn Owl Monitoring Programme: 2000-2007
Citation
Leech, D.I., Barimore, C.J. & Shawyer, C.R. 2008. The BTO Barn Owl Monitoring Programme: 2000-2007.
