placoderm: References & Edit History
More Articles On This Topic
Article Contributors
Primary Contributors
-
The Editors of Encyclopaedia Britannica
Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. They write new content and verify and edit content received from contributors.
Other Encyclopedia Britannica Contributors
Article History
| Type | Description | Contributor | Date |
|---|---|---|---|
| Invalidated site: Zipcode Zoo - Placodermi. | Dec 26, 2017 | ||
| Updated geologic time data. | May 25, 2010 | ||
| Article revised and updated. | Aug 11, 2008 | ||
| Added new Web site: Memorial University - Placodermi. | Apr 20, 2008 | ||
| Added new Web site: University of California Museum of Paleontology - Placodermi. | Apr 20, 2008 | ||
| Article revised and updated. | Aug 24, 2007 | ||
| Article added to new online database. | Jul 20, 1998 |
View Changes:
Article History
Revised:
By: