| Author: | Greenhow, T. M. (Thomas Michael), 1791-1881 |
| Subject: | RC, Smallpox -- Vaccination, Smallpox vaccine |
| Format: | Electronic text |
| Date issued: | 2015 |
| Language: | English |
| Publisher: | Project Gutenberg, |
| Rights: | Public domain in the USA. |
| Download link: | An Estimate of the True Value of Vaccination as a Security Against Small Pox [electronic resource] / T. M. Greenhow |