Note 18 — BULLETIN OF THE NUTTALL ORNITHOLOGICAL CLUB. VOL. VII. January, 1882. No. I.
Reading edition
Birds Dak. and Mont., Bull. U.S. Geol. Surv., IV, No. 3, 1878, p. 561.
Reading edition
Birds Dak. and Mont., Bull. U.S. Geol. Surv., IV, No. 3, 1878, p. 561.