Hi Jenny,
The Version Identification Framework (VIF) has a page on the use of cover
sheets , including an overview, pros and cons, potential information to
include and also gives a couple of links to examples where repositories
are using them. It's focused more on version information than copyright
etc, but still should be useful to you.
The Framework is at www.lse/library/vif and the specific cover sheet link
is http://www.lse.ac.uk/library/vif/Framework/Object/cover.html.
Hope it's helpful.
Best wishes, Jenny
Jenny Brace
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