What kind of personal file number should I use for books or articles in journals that I own? I won't be making copies of them. But I would like to reference everyone mentioned in these sources. For example, I have a book called "Old Families of Louisiana". It is broken down into sections by family name. Because so many people are mentioned in this book, I would like to break down my Clooz document groupings by these sections. So, the source would be "Old Families of Louisiana". And let's say one of the sections I'm referencing is "Watts". Any suggestions as to what I should use for the Document number? Book-Watts? Book-OFL-Watts? (I thought I should perhaps start the document number with "Book" because it is filed with my books.) Has anyone else run into something like this?