this edition written and researched by Oliver Berry [and 4 others] this edition written and researched by Oliver Berry [and 4 others this edition written and researched by Alexis Averbuck [and 3 others] this edition written and researched by Tom Masters [and others] this edition written and researched by Ryan Ver Berkmoes [and 9 others] this edition written and researched by Alexis Averbuck [and 3 others this edition written and researched by Amy C Balfour [and 4 others] this edition written and researched by Oliver Berry ... [et al.] this edition written and researched by Steve Fallon [and others]. this edition written and researched by Tom Masters [and others