Brewster's warbler (Helminthophila leucobronchialis) : A hybrid between the golden-winged warbler (Helminthophila chrysoptera) and the blue-winged warbler (Helminthophila pinus) / by Walter Faxon.

v.40:no.6 (1913)

Brewster's warbler / by Walter Faxon.

v.40:no.2 (1911)