» CIA - The World Factbook: United States Pacific Island Wildlife Refuges    Features map and brief descriptions of the geography, people, government, economy, communications, transportation, military and transnational issues.    https://www.cia.gov/library/publications/the-world-factbook/geos/um.html

» Wikipedia - Kingman Reef    Hyperlinked encyclopedia article covers the island's history and geography.    http://en.wikipedia.org/wiki/Kingman_Reef