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  Preserve all the copyright notices of the Document.

  Add an appropriate copyright notice for your modifications adjacent to

the other copyright notices.

  Include, immediately after the copyright notices, a license notice giving

the public permission to use the Modified Version under the terms of

this License, in the form shown in the Addendum below.

  Preserve in that license notice the full lists of Invariant Sections and

required Cover Texts given in the Document's license notice.

  Include an unaltered copy of this License.

  Preserve the section entitled  History , and its title, and add to it an

item stating at least the title, year, new authors, and publisher of the

Modified Version as given on the Title Page. If there is no section entitled

 History  in the Document, create one stating the title, year, authors,

and publisher of the Document as given on its Title Page, then add an

item describing the Modified Version as stated in the previous sentence.

  Preserve the network location, if any, given in the Document for public

access to a Transparent copy of the Document, and likewise the network

locations given in the Document for previous versions it was based on.

These may be placed in the  History  section. You may omit a network

location for a work that was published at least four years before the

Document itself, or if the original publisher of the version it refers to

gives permission.

  In any section entitled  Acknowledgements  or  Dedications , preserve

the section's title, and preserve in the section all the substance and tone

of each of the contributor acknowledgements and/or dedications given

therein.