| Author: | Bell, Alexander Graham, 1847-1922 |
| Subject: | TK, Telephone |
| Format: | Text |
| Date issued: | 2017 |
| Language: | English |
| Publisher: | Project Gutenberg, |
| Rights: | Public domain in the USA. |
| Download link: | The Telephone : A lecture entitled Researches in Electric Telephony [electronic resource] / Alexander Graham Bell |