For more information and better images of most of these puzzles, please visit the following websites:
[Puzzle World - John Rausch]
[IPP Puzzle Competition]
[Nick Baxter's Puzzle Links]
[Puzzlewood - Bernhard Schweitzer]
[The Puzzle Museum]
[Jerry Slocum's Collection]
[World of Craft Puzzle]
[Puzzle Will be Played]
[Jaap's Puzzle Pages]