Science

Dinosaurs, with Special Reference to the American Museum Collections

How it Works

A Monograph of the Trilobites of North America: with Coloured Models of the Species

The World of Flying Saucers: A Scientific Examination of a Major Myth of the Space Age

Essays of a Biologist

Balanced Interactions

Beauty and the Brain

Gene Dialogues

Future Food

The Evolution of Worlds

Cosmic Frequencies

Nonlinear Methods in Dynamic Structures

Adaptation Surges

Celestial Beings

Moon Cycles

Principles of Geology

Prairie, Peak, and Plateau: A Guide to the Geology of Colorado

Hands-On Science

Crania Ægyptiaca

Conspecificity of two pocket mice, Perognathus goldmani and P. artus