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¿This is what publication of the Dahlgren system? I does not have any references. —Preceding unsigned comment added by RoRo en wiki (talk • contribs) 11:43, 29 January 2009 (UTC)
Accuracy
editThis needs to be carefully checked against original sources. I have made numerous corrections but have not checked every entry. It looks as if a secondary source may have been used --Michael Goodyear (talk) 03:18, 2 July 2016 (UTC)