Internet, https://archive.lib.msu.edu/uahc/FindingAids/ua17-2.pdf, 2020-05-07
Information trouvée : Michigan State University Archives and Historical Collections
The English sparrow (Passer domesticus) in North America : especially in its relations
to agriculture / by Walter B. Barrows / Washington, D.C. : U.S. Dept. of Agriculture,
Division of Economic Ornithology and Mammalogy , 1889