I discovered this document, Share-Alike, NonCommerical, and Public Domain, authored by OEE Editorial (Open Education Europa) very recently published by The University of Cambridge Faculty of Education. It's focused specifically as the title states on specific Creative Commons licenses. If these are the type of licenses you are using or want more information on, this document will give you a wealth of understanding in very concrete ways. For example, you are using an image and want to understand the difference between adapting it for, or simply including it in a document, and how to do this properly, this is the document for you. Well worth a peek!