Apra Harbor (English Wikipedia)

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Haw, Jim; Heneghan, Meghan (May 30, 2013). "Dreading the Dredging: Military Buildup on Guam and Implications for Marine Biodiversity in Apra Harbor". Scientific American. Retrieved March 10, 2021.

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Conrad, Dennis (28 March 2017). "The War Begins: The United States Navy and the German Cruiser Cormoran". The Sextant. Histories and Archives Division, Naval History and Heritage Command. Archived from the original on 19 March 2021. Retrieved 6 March 2021.

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