Is there a way to create a class of users or class of pages that can only be edited by a few people?

I want to insert a set of documents into my wiki that really needs to be static, except for minor changes from time to time. The people that will do this work will need access to the wiki as a whole. But most wiki users should see these documents as protected. The people editing the protected documents do not need to be general site admins.

How can I set this up?

thanks

Bill