Birds from Coahuila, Mexico

by Emil K. Urban

1938. Ibid. (Publ. 430), Zool. Ser., 13(Pt. XI):vi+662 pp., December 31.

Hellmayr, C. E., and Conover, B.

1942. Catalogue of birds of the Americas. Field Mus. Nat. Hist. (Publ. 514), Zool. Ser., 13(Pt. I, no. 1):vi+635 pp., April 30.

1938. A new grackle of the Cassidix mexicanus group. Occas. Papers Mus. Zool., Louisiana State Univ., 1:1-11, May 4.

Marsh, E. G., Jr., and Stevenson, J. O.

1938. Bird records from northern Coahuila. Auk, 55:286-287, April.

Mayr, E.

1946. History of the North American bird fauna. Wilson Bull., 58:3-41, March.

Merriam, C. H.

1898. Life zones and crop zones of the United States. U.S. Dept. Agric., Div. Biol. Surv., 10:1-79.