(1) Public documents from public sources are clearly identified and may be freely used and copied. (2) School materials are for use only by students at Columbia School, EMCSD, El Monte, California; all other uses require the written permission of the site sponsor. (3) For all other materials, the following notice applies: Copyright 2007 William Mason. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed without written permission.