I. C. Russell Dual Channel Sidescan Sonar — Uses and Operation in Hydrographic Surveying PDF (English)
J. Tolson Developments in Digitising and Voice Recognition to Meet the Requirements of Hydrography and Cartography PDF (English)
W. J. Monteith, A. J. Kerr, A. Pittman History of the Great Lakes Charting Advisers (Cooperative Charting by Canada and the United States) PDF (English)
