Web Site: http://www.coulthart.com/avery/index.html
• http://www.coulthart.com/avery/needlecase-pages/horseshoe.htmlBook: Rogers, Gay Ann. 1983 An Illustrated History of Needlework Tools.
• pg 77 -79Book: Thompson, Helen. Sewing Tools and Trinkets: Collector's identification and value guide (Vol 2).
• pg 43