[2] マルデン島 - Wikipedia, , https://ja.wikipedia.org/wiki/%E3%83%9E%E3%83%AB%E3%83%87%E3%83%B3%E5%B3%B6
[1] 04 May 1866 - MALDEN ISLAND AND ITS GUANO DEPOSITS. - Trove, https://trove.nla.gov.au/newspaper/article/3750044
[4] Papers Past | Newspapers | Colonist | 20 March 1866 | MALDEN ISLAND AND ITS GUANO, National Library of New Zealand, https://paperspast.natlib.govt.nz/newspapers/TC18660320.2.21
[3] feasibility-cat-eradication-recovery-seabirds-malden-island.pdf, , https://kiribati-data.sprep.org/system/files/feasibility-cat-eradication-recovery-seabirds-malden-island.pdf