Philadelphia Zoological Gardens: References & Edit History
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Article History
| Type | Description | Contributor | Date |
|---|---|---|---|
| Map added. | Jul 12, 2023 | ||
| Deleted Web site: Listing and photographs. | Aug 23, 2013 | ||
| Added new Web site: The Official Site of the Philadelphia Zoo. | Jul 20, 2006 | ||
| Article revised. | Aug 20, 1999 | ||
| Article added to new online database. | Jul 20, 1998 |
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