Statistics Norway. Statistical yearbook of Norway 2004 (123rd issue). Statistk sentralbyra (Oslo).

{2004:8253766157} Statistics Norway. Statistical yearbook of Norway 2004 (123rd issue). Statistk sentralbyra (Oslo). . ISSN=08091919; ISBN=8253766157, 8253766165; NCID=AA11336461. Lang=ENG.