Study of the Risk of Collision with Power Lines by Common Terns and Waterbirds at Shotton Steel Works, North Wales Balmer D.E. Spiral / 2002 / Engelsk
Study of the Risk of Collision with Power Lines by Common Terns at Shotton Steel Works, North Wales Balmer D.E. Spiral / 2006 / Engelsk
Study of the Risk of Collision with Power Lines by Waterbirds at Shotton Steel Works, North Wales Balmer D.E. Spiral / 2006 / Engelsk
Assessment of the Feeding Requirements of Overwintering Waterfowl at Hickling Broad Balmer D.E. Spiral / 2006 / 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
