this edition written and researched by Steve Fallon [and others]. this edition written and researched by Amy C. Balfour [and others]. this edition written and researched by Tom Masters [and others]. this edition written and researched by Amy C Balfour [and 4 others] this edition written and researched by Tom Masters [and others] this edition written and researched by Alexis Averbuck [and others]. this edition written and researched by Amy C. Balfour [and 5 others] this edition written and researched by Amy C. Balfour [and 6 others] this edition written and researched by Neil Wilson [and nine others] this edition written and researched by Oliver Berry [and 4 others]