this edition written and researched by Tom Masters [and others]. this edition written and researched by Tom Masters [and others] this edition written and researched by Tom Masters [and others 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 Alexis Averbuck [and others]. this edition written and researched by Oliver Berry [and 4 others] this edition written and researched by Amy C Balfour [and 4 others] this edition written and researched by Anthony Ham [and 12 others]. this edition written and researched by Oliver Berry [and 4 others