Sparrows and Finches of the Great Lakes Region and Eastern North America
Earley, Chris G.
Swallows & Martins: An Identification Guide and Handbook [Helm]
Turner, Angela and Chris Rose
A Guide to the Identification and Natural History of the Sparrows of the United States and Canada.
Rising, James D.
Finches. New Naturalists Number 55
Studies in Behavior and Phylogeny of Certain New World Jays (Garrulinae)
Hardy, John William
Communications and Relationships in the Genus Tyrannus.
Smith, W. John
The Cowbirds: A Study in the Biology of Social Parasitism
Songbirds of Turkey: An Atlas of Biodiversity of Turkish Passerine Birds
Roselaar, Cees S.
Warblers of the Great Lakes Region and Eastern North America
Geographic Variation in the White-crowned Sparrow, Zonotrichia Leucophyrs
BANKS, Richard C.
Speciation in the Avian Genus Junco