truetrue This image is a derivative work of the following images: File:Wikibooks-logo-en.svg licensed with Copyright by Wikimedia 2009-01-17T13:05:54Z Ramac
truetrue This image is a derivative work of the following images: File:Wikibooks-logo-en.svg licensed with Copyright by Wikimedia 2009-01-17T13:05:54Z Ramac
truetrue This image is a derivative work of the following images: File:Wikibooks-logo.svg licensed with Copyright by Wikimedia 2009-01-15T17:51:28Z Mike.lifeguard