Guy, Neil. “The Makers of Blueback Charts: A History of Imray Laurie Norie and Wilson Ltd. Susanna Fisher. Imray Laurie Norie and Wilson, St. Ives, 2001. ”. The International Hydrographic Review, vol. 2, no. 3, Dec. 2001, https://journals.lib.unb.ca/index.php/ihr/article/view/20564.