this edition written and researched by Andrew Bender...[et al.] this edition written and researched by Sara Benson...[et al.] this edition written and researched by Mark Baker...[et al.] this edition written and researched by Sandra Bao ...[et al.] this edition written and researched by Sandra Bao... [et al.] this edition written and researched by Korina Miller...[et al.] this edition written and researched by Damian Harper...[et al.] this edition written and researched by Daniel Robinson...[et al.] this edition written and researched by Oliver Berry ... [et al.] this edition written and researched by Oliver Berry ...[et al.]