Assessment of the global population size of the Mongolian gazelle Procapra gutturosa oleh Bayarbaatar Buuveibaatar, Samantha Strindberg, Barkhasbaatar Ariunbaatar, Sodnompil Batdorj, Tsogt Batzaya, Tserendeleg Dashpurev, Nandintsetseg Dejid, Vadim E. Kirilyuk, Thomas Mueller, Galsandorj Naranbaatar, Baatargal Otgonbayar, Enkhtuvshin Shiilegdamba, Jambalsuren Tsolmon, Dorj Usukhjargal, Ganbold Uuganbayar, Kirk A. Olson