"Fort De La Boulaye". National Historic Landmark summary listing. National Park Service. Archived from the original on 2011-03-08. Retrieved 2008-01-28. <--Dead link, November 2015.
"Fort De La Boulaye". National Historic Landmark summary listing. National Park Service. Archived from the original on 2011-03-08. Retrieved 2008-01-28. <--Dead link, November 2015.