Source: Northwest Quarterly magazine, Spring Summer 2016, Vol. 13, No. 3, cover and table of contents
A Digital Collection of Rockford, Illinois History
Source: Northwest Quarterly magazine, Spring Summer 2016, Vol. 13, No. 3, cover and table of contents
Source: The Mammals of Winnebago County, by Elizabeth Maycock Mullen, published by Winnebago County Forest Preserve District, 1991