Hayes, J. H. “ECHO SOUNDING - XII: A. Report on Sea Trials of Deep Water Echo Sounding Gear in H.M.S. Challenger and Ormonde”. The International Hydrographic Review, no. 2 (June 7, 2018). Accessed May 15, 2024. https://journals.lib.unb.ca/index.php/ihr/article/view/28261.