The survey would supply ready made, reliable material for his dinosaur book.
But he also found time to write extensively, publishing several heavily illustrated dinosaur books that won him acclaim from both the public and scientists.
There were five dinosaur books on a recent day, compared with three dozen a few years ago.
The stegosaur classification has fallen out of favor, but is seen in older dinosaur books.
A new kind of dinosaur book is stomping onto the scene, and it's going to make a lot of people very happy.
So often they come away from a dinosaur book saying "ichthyosaur"; this one will make them say "wow!"
For those wanting more scientific accounts of dinosaurs, there were the first nontechnical dinosaur books.
"Well, I bought her a dinosaur book," he said.
Knight's illustration, and others derived from it, continued to appear in dinosaur books aimed at a popular audience throughout the 20th century.
However, it has appeared in many popular dinosaur books, with varying identifications.