Find and update replaced references incorrectly

I had a couple hundred references in an old library that I wanted updated (many would have been manually entered).  Most appear to be just fine, with doi added or author name standardized, but a few references are clearly the wrong thing (this is a social science paper and now there are a few references about odd things like fishery science articles on the management of trout ponds).  Is there a way to see the previous version of the reference so that I can fix it?