Description of some new species of organic remains of the Cretaceous group of the U.S. with a tabular view of the fossils hitherto discovered in this formation.

Journ. Acad. Nat. Sci. 8. 207-227. 1839-1842.

Overlapping group identification in an industrial setting /

Presented at the meetings of the American Psychological Association at Denver, Colorado, September 1949.