A truly classic tale. Since it was written in 1929 (no pub.date but paperback so robably ub in 40s) you will see the forerunner of some of our more modern dinosaur fantasies.
In the tradition of Doyle's "The Lost World" and Burroughs' "The Land That Time Forgot". Dinosaurs survive today, and those who would see for themselves face mortal peril! If the claws and venomous jaws don't get you, there's always the volatile landscape.