Drawing showing the appearance of the headlands and islands of the Bering Strait, as viewed from the south.
National Geospatial-Intelligence Agency
2009
National Geospatial-Intelligence Agency (2009) Sailing Directions (Enroute) East Coast of Russia Pub 155, 10th edition, p 4. <a rel="nofollow" class="external free" href="http://msi.nga.mil/MSISiteContent/StaticFiles/NAV_PUBS/SD/Pub155/Pub155bk.pdf">http://msi.nga.mil/MSISiteContent/StaticFiles/NAV_PUBS/SD/Pub155/Pub155bk.pdf</a>