Geologic Periods: How Our Concepts Have Changed

By

Richardson, Eugene S., Jr. (Eugene Stanley), 1916-1983

Type

Article

Date of Publication

1950

Original Publication

Bulletin

Volume

21

Series / Issue

Issue: 9

Pages

5--8

Contributed by

Field Museum of Natural History Library

Language

English

Published by

[Chicago, Ill.], The Museum, [1944-1966]