| Author: | Desautels, Paul E., 1920-1991 |
| Subject: | NK, Precious stones, Gems, Smithsonian Institution |
| Format: | Electronic text |
| Date issued: | 2020 |
| Language: | English |
| Publisher: | Project Gutenberg, |
| Rights: | Public domain in the USA. |
| Download link: | Gems in the Smithsonian Institution [electronic resource] / Paul E. Desautels |