Handbuch der Gefiederkunde Europäischer Vögel
Major new handbook on the feathers and plumage of all European bird species. The initial volume covers general aspects of plumage, and provides identification keys for orders and families. Volumes 2 to 10 will provide complete systematic coverage for all species, with keys, descriptions and colour & line plates. Text in German. Volumes should appear at 1-2 year intervals.