| Author: | Prudential Insurance Company of America |
| Subject: | RC, Poliomyelitis -- Popular works |
| Format: | Electronic text |
| Date issued: | 2021 |
| Language: | English |
| Publisher: | Project Gutenberg, |
| Rights: | Public domain in the USA. |
| Download link: | "Polio" : Infantile Paralysis [electronic resource] / Prudential Insurance Company of America |