To See or Not to See: Investigating Detectability of Ganges River Dolphins Using a Combined Visual-Acoustic Survey Richman, Nadia I. ; Gibbons, James M. ; Turvey, Samuel T. ; Akamatsu, Tomonari ; Ahmed, Benazir ; Mahabub, Emile ; Smith, Brian D. ; Jones, Julia P. G. Abstract Publication: PLoS ONE Pub Date: May 2014 DOI: 10.1371/journal.pone.0096811 Bibcode: 2014PLoSO...996811R