Sources - for this page...
Gandee, Lee, "Strange Experience -- The Autobiography of a Hexenmeister". New York, N.Y.: Reward Books/Prentice Hall, 1971.
Greth, Don, "Hearts, Tulips, Distelfinks -- A Study of the History & Sumbolism of Hex Signs PA. Dutch Folklore Designs". Bird-in-Hand, PA: Don Greth, 1982.
Hoyt, Ivan E., "Hex Signs -- Tips, Tools, and Techniques for Learning the Craft", Mechanicsburg, PA: Stackpole Books, 2008.
Mauer, Walt, "Hex Signs and Their Meanings". Gettysburg, PA: Garden Spot Gifts, 1996.
Yoder, Don & Graves, Thomas E., "Hex Signs -- Pennsylvania Dutch Barn Symbols & Their Meaning Revised & Expanded Edition. Mechanicsburg, PA: Stackpole Books, 2000.
Zook, Jacob & Jane, "Hexology -- The History and Meanings of Hex Signs". Paradise, PA: Jacob Zook's Hex Shops, Inc., November 1990 printing.
The History of Hex Signs. Paradise, PA: Will-Char - The Hex Place, 1999. No author listed. Information on Jacob Zook, his technique and some of his designs.
Internet Sources as given above under Internet Research.