Classic studies are right by definition, that is why they are referred to as classic.
Which is why the cigarette companies keep pointing to their classic studies...
That is my point, if you have an agenda you can view a study as classic, while others may view it as idealogy. I am not familiar with your specific study, but I am familiar with competing agendas producing contradictory classic studies. Citing something as a classic study isn't very meaningful. Produce actual arguments that we can discuss here, and then we will have something to talk about. Argument by authority doesn't go over very well in this group, and I'm sure you are aware.