When I first learned about the prehistoric (mega)fauna that we now commonly call non-avian dinosaurs they where just referred to as dinosaur. I am trying to figure out when we made the collective switch in articles and literature to the use of "non-avian dinosaur".
Merriam-Webster provides us with a definition and indicates that the first known use is in 1988. But that does not indicate it was in common use nor general knowledge that birds are a descendant of dinosaurs which means we need to distinguish between avian and non-avian dinosaurs.
So can someone help me find when the trend to the more specific non-avian dinosaurs got started?