Scope and Contents The relationship between the American Museum of Natural History and the Childs Frick Corporation has been in existence since 1923. The activities of the Corporation consisted in carrying out field explorations of fossilized remains of extinct mammals in Vertebrate Paleontology. The Frick expeditions were undertaken by field parties working in various states, including Alaska, Arizona, California, Colorado, Florida, Idaho, Kansas, Mexico, Montana, Nebraska, Nevada, New Mexico, North Dakota,...