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Declining Orangutan Encounter Rates from Wallace to the Present Suggest the Species Was Once More Abundant
Meijaard E,
Welsh A,
Ancrenaz M,
Wich S,
Nijman V,
et al.
(2010)
Declining Orangutan Encounter Rates from Wallace to the Present Suggest the Species Was Once More Abundant.
PLOS ONE 5(8): e12042.
https://doi.org/10.1371/journal.pone.0012042