Ar ben tudalen deitl = At head of title: Institute of Terrestrial Ecology (Natural Environment Research Council)
Rhif cytundeb = Contract no.FC 73-01-243.
Rhif project = Project no.T08082H1.
Review of bird species and habitat interactions in Welsh terrestrial lowland environments. Published by Countryside Council for Wales in 1999. Publication and catalogue information, links to buy online and reader comments.