Be careful about "throwing the baby out with the bathwater."
R. L. Wilson got his postion of authority from great knowledge, which he used to rip off wealthy collectors.
Many of his books are the products of other authors who did a lot of research.
R. L. Wilson was a consultant/editor whose name gave credit to that research.
There is a lot of good information and wonderful illustrations in his books.
Where you need caution is in dealing on high dollar value firearms, where the value lies in his authentication.
He's not the first, and won't be the last fraudster in collector's firearms.