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Article Source: An Emperor Penguin Population Estimate: The First Global, Synoptic Survey of a Species from Space
Fretwell PT, LaRue MA, Morin P, Kooyman GL, Wienecke B, et al. (2012) An Emperor Penguin Population Estimate: The First Global, Synoptic Survey of a Species from Space. PLOS ONE 7(4): e33751. https://doi.org/10.1371/journal.pone.0033751

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