this edition written and researched by Mary Fitzpatrick [and 4 others]. this edition written and researched by Amy C Balfour [and 4 others] this edition written and researched by Alexis Averbuck [and 3 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 Amy C. Balfour [and others]. this edition written and researched by Oliver Berry [and 4 others] this edition written and researched by Mary Fitzpatrick...[et al.] this edition written and researched by Amy C. Balfour [and six others].