I think a local file reference should contain some information as to what is contained in the file.. I have some but I don't do them as a local reference.
- Chronicle of Georges dit Chambre Walter (primary source of information about his family and other glass makers in his towns) French acts of birth, marriage, and death. Family documents. GenVerre publications and database. Maitre Verrier (master glass maker) internationally known in his time through modern day. Chronicle he wrote in 1700s has been published in English, French, and German that I know of. He is used as a source in many scholarly works including the Krakow Library of Steuben Glass.
I have the data in several languages. French and German have been published on the web, English at this point has not. I intend to create a free space page and put it up there. But at this point it is still in my computer as I have some work to do to clean it up before putting it on a free space page
An example might be a diary a relative kept Those have great daily points of interest to many local historians and researchers. So list it as Diary of Joe Smith written during the years 1750 to 1800 in the town of XYZ. PM has copy in his (or her) possession.
To me that explains the source of the information as primary source material from a specific person, at a specific time, in a specific location.
I think we need to just do some decisions and them publish to everyone how to create these kind of sources.
Others can be info from copyrighted books in libraries. Wolrdcat.org might be good for this. You could at least link to the name of the book and it would then list all the places it is located in libraries around the world. I would find that very valuable.
Just my thinking as I have a good number of sources from books that are under copyright like Montbronn by Joseph Conrad.