The Smith Chart is a clever way of graphically solving impedance matching problems—it is still useful today despite the availability of computer based solutions.

• Smith-Chart Calculations for the Radio Amateur - Part 1 
  QST January 1966, pp. 22-26
  Graphical Solutions of Transmission-Line Problems
• Smith-Chart Calculations for the Radio Amateur - Part 2 
  QST February 1966, pp. 30-33
  Graphical Solutions of Transmission-Line Problems
• Another Look at Reflections 
  Everything you wanted to know about SWR … and then some.

• A Collection of Smith Chart Resources by Spread Spectrum Scene.

• Maxim Application Note 742 Impedance Matching and the Smith Chart: The Fundamentals