Note 32 — BULLETIN OF THE NUTTALL ORNITHOLOGICAL CLUB. VOL. VII. January, 1882. No. I. (continued 2)
Reading edition
A List of the Birds of Minnesota. By Dr. P. L. Hatch. Ninth Ann. Rep. Geol. and Nat. Hist Surv. Minn., for 1880, 1881, pp. 361–372.
The Water Birds of Minnesota. By Thomas S. Roberts. Op. cit., pp. 373–383.