- M. Bager ed., with L. Hansen, Per Jessen (researchers) 'Danish Baltic Catch Data, 1611-1920' in J.H Nicholls (comp.) HMAP Data Pages (https://oceanspast.org/hmap_db.php), more
- HMAP: M.G Barnard, N. Ascroft, J.H Nicholls (Comp.), 2002. HMAP - History of Marine Animal Populations Database. Hull, United Kingdom., more
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