You may combine the Document with other documents released under -this License, under the terms defined in section -4 above for modified versions, provided that you include in the -combination all of the Invariant Sections of all of the original -documents, unmodified, and list them all as Invariant Sections of your -combined work in its license notice, and that you preserve all their -Warranty Disclaimers.
The combined work need only contain one copy of this License, and -multiple identical Invariant Sections may be replaced with a single -copy. If there are multiple Invariant Sections with the same name but -different contents, make the title of each such section unique by adding -at the end of it, in parentheses, the name of the original author or -publisher of that section if known, or else a unique number. Make the -same adjustment to the section titles in the list of Invariant Sections -in the license notice of the combined work.
In the combination, you must combine any sections Entitled -"History" in the various original documents, forming one section -Entitled "History"; likewise combine any sections Entitled -"Acknowledgements", and any sections Entitled "Dedications". You must -delete all sections Entitled "Endorsements".