Hardin, Danny. A Lightning Primer from the GHCC.

Hubler, Graham K. Lightning Fluff balls of fire.

Kim, Yoon. St. Elmo's Fire and Ball of Lightning. 2001.

McEuen, Mark. Lightning!.

The Physics Zone

Robinson, Dan. West Virginia Lightning. 2003.

Types of Lightning.

The Weather Channel Interactive, Inc. weather.com - safety -lightning. 2003.