Dahlbergh, Erik Jönsson, greve, Pufendorf, Samuel, Freiherr von, and Christoph Riegel. "Delineatio arcis Cronenburgensis quam sereniss. rex Sueciae amplioribus munimentis cingere fecit A. 1659." Print. Nuremberg: Sumptibus Christophori Riegelij, [1696]. Norman B. Leventhal Map & Education Center, https://collections.leventhalmap.org/search/commonwealth:ht250238d (accessed April 24, 2024).