Resume in the Usage of Winter Stubbles by Birds on Arable Farmland in the UK Henderson I. G. Spiral / 1999 / Engelsk
Bird's Eye Walls Partnership for Sustainability - Progress Report on the Use of Pea Fields by Birds Henderson I. G. Spiral / 2003 / Engelsk
Birds Eye Walls Partnership for Sustainability. Progress Report on the Use of Pea Fields by Birds Henderson I. G. Spiral / 2003 / Engelsk
Study of the Risk of Collision with Power Lines by Common Terns at Shotton Steel Works, North Wales Henderson I. G. Spiral / 1995 / Engelsk
Large-Scale Survey of the Use of Winter Bird Crops by Foraging Birds on Farmland Henderson I. G. Spiral / 2005 / Engelsk
Birds Eye Walls Partnership for Sustainability. Progress Report on the Use of Pea Fields by Birds Henderson I. G. Spiral / 2003 / Engelsk
Designing Crop/plant Mixtures to Provide Food for Seed-eating Farmland Birds in Winter Henderson I. G. Spiral / 2003 / Engelsk
Relative Abundance of Birds on Farmland in Relation to Game-cover and Winter Bird Crops Henderson I. G. Spiral / 2003 / Engelsk
Barn Owl Productivity and Survival in Relation to the Use of Second-generation Rodenticides in 1988-1990 Henderson I. G. Spiral / 1993 / Engelsk
Study of Risk of Collision with Power Lines by Waterbirds in Winter at Shotton Steel Works, North Wales Balmer D.E. Spiral / 1997 / Engelsk
Birds and Sustainable Agriculture at Colworth Park: A Progress Report for Winter 1999/2000 and Summer 2000 Henderson I. G. Spiral / 2012 / Engelsk
Winter Bird Audit for the Colworth Estate 1999/2000, 2000/2001 Henderson I. G. Spiral / 2012 / Engelsk
