This is a new release of the original 1939 edition.

Dr. Colbert Describes The Individual Types Of Dinosaurs, And Presents Accounts Of Scientists, Past And Present, Who Have Collected And Studied Them. A Classification Of The Dinosaurs, Arranged Geologically And Geographically, Is Included.

Contributions To The Osteology, Affinities, And Distribution Of The Crocodilia, No. 41.

With Critical Additions By The Author And Others And A Bibliography Of His Scientific Works.

With Critical Additions By The Author And Others And A Bibliography Of His Scientific Works.

With Critical Additions By The Author And Others And A Bibliography Of His Scientific Works.