http://www.volleyhall.org/history.html
http://www.active.com/volleyball/articles/proper-technique-for-passing-871781
http://www.wikihow.com/Set-a-Volleyball
http://www.wikihow.com/Spike-a-Volleyball
http://answers.yahoo.com/question/index?qid=20090527025511AAFaMzB
http://www.volleytastic.com/playing-volleyball/basic-volleyball-rules/
http://www.active.com/volleyball/articles/proper-technique-for-passing-871781
http://www.wikihow.com/Set-a-Volleyball
http://www.wikihow.com/Spike-a-Volleyball
http://answers.yahoo.com/question/index?qid=20090527025511AAFaMzB
http://www.volleytastic.com/playing-volleyball/basic-volleyball-rules/