Notes on early illustrations and the juvenile plumage of the extinct Hawaii Mamo Drepanis pacifica (Drepanidini)v. 129No. 4206–212
Olson, Storrs L. and Hume, J. P. 2009. "Notes on early illustrations and the juvenile plumage of the extinct Hawaii Mamo Drepanis pacifica (Drepanidini)." Bulletin of the British Ornithologists' Club, 129, (4) 206–212.