This is the group I play soccer with every Sunday morning. Some people in this group have been playing in this pickup game since 1970, although I didn't start until 1980.  (I'm wearing the football uniform with 50 on it  in the top picture, and my son is sitting in front of me wearing sun glasses.) 

Soccer-related sources

The Complete Soccer Rules

Soccer WWW Pages around the world

FIFA's World Wide Web main page.