• Solar Versus Standard Time
• Graphic (or Geometric) Method of Construction
  - http://home.netcom.com/~abraxas2/
  http://home.netcom.com/~abraxas2/horz.htm
  http://home.netcom.com/~abraxas2/vert.htm
  - http://www.sundials.co.uk/projects.htm#hdial2
  - The Sundial Primer (see below)
  
• NASS
  http://www.sundials.org/links/
• Dover Publications
  1. Mayall
     http://store.yahoo.com/doverpublications/048641146x.html
     
  2. Waugh
     http://store.yahoo.com/doverpublications/0486229475.html
• The Sundial Primer, created by Carl Saban
  http://www.mysundial.ca/tsp/tsp.html
  http://www.mysundial.ca/sdu/sdu_index.html
  *http://www.mysundial.ca/sdu/sdu_long_hand_sundials.html
  
• Illustrating Shadows
  http://www.illustratingshadows.com/