In light of Michel-Adrien’s very interesting note, here are some materials I found recently.
This diagram is from a 1979 paper on the elements of legal research and analysis.
I wonder how this would compare with a model of current practices.
I discovered it at MIT’s Dspace repository. Here is a link to the record:
But the most interesting thing about the search process was searching techxtra for “legal research.” This service searches multiple specialized sources and provides results in a very legible way.