gas mask: References & Edit History
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Article History
| Type | Description | Contributor | Date |
|---|---|---|---|
| Modified link of Web site: Social Studies for Kids - The Twofold Genius of Garrett Morgan. | Jul 08, 2024 | ||
| Media added. | Feb 28, 2023 | ||
| Added cross-references throughout. | Feb 28, 2023 | ||
| Add new Web site: LiveScience - Do Gas Masks Work? | Mar 13, 2019 | ||
| Add new Web site: Inventors and Inventions - The Gas Mask. | Mar 13, 2019 | ||
| Add new Web site: History Learning Site - Gas Mask. | May 27, 2015 | ||
| Add new Web site: Social Studies for Kids - The Twofold Genius of Garrett Morgan. | Mar 30, 2015 | ||
| Article added to new online database. | May 04, 1999 |
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