During a three years' residence at Marshalltown, Marshall County, Iowa, ending September 15, 1915, the writer spent most of his spare time in a study of the avifauna of the region. Nearly all parts of the county were visited, the area within which most of the work was done being indicated on the accompanying map.
Proceedings of the Iowa Academy of Science
©1918 Iowa Academy of Science, Inc.
Gabrielson, Ira N.
"A List of the Birds Found in Marshall County, Iowa,"
Proceedings of the Iowa Academy of Science, 25(1), 123-153.
Available at: https://scholarworks.uni.edu/pias/vol25/iss1/17