International Congress of Navigation (11th : 1908 : St. Petersburg); Permanent International Association of Navigation Congresses (1908). Report of proceedings. University of California Libraries. Brussels.{{cite book}}: CS1 maint: numeric names: authors list (link)
(The International Hydrographic Organization), wpe (26 July 2018). "International Hydrographic Organization Brochure"(PDF). International Hydrographic Organization. Archived(PDF) from the original on 30 November 2018. Retrieved 14 May 2022.
(The International Hydrographic Organization), wpe (26 July 2018). "International Hydrographic Organization Brochure"(PDF). International Hydrographic Organization. Archived(PDF) from the original on 30 November 2018. Retrieved 14 May 2022.