Aerial view of Ball’s Pyramid, Lord Howe Island Group, NSW, Australia
National Imagery and Mapping Agency (NIMA), now National Geospatial-Intelligence Agency
not specified
<a rel="nofollow" class="external free" href="http://pollux.nss.nima.mil/NAV_PUBS/SD/Pub127/">http://pollux.nss.nima.mil/NAV_PUBS/SD/Pub127/</a>, page 105 (jpg extracted from pdf document)