PDF Bookmarks: Surveying the Options
http://www.acrobatusers.com/articles/2007/02/bookmark_options/index.php

Johnson, Duff
Adobe
2007

Abstract:

Most PDF files do not include bookmarks. This is a pity, because they are so easy to add, and because the real-world usability of longer PDF files suffers significantly by their absence. And there's no shortage of tools for creating and managing bookmarks, as this product survey article explains.