This work, previously under Public Domain, or a Free License has been digitally enhanced, I the creator of this work, hereby grant the permission to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.GNU Free Documentation LicenseGFDLhttps://www.gnu.org/copyleft/fdl.htmltrue