| 其他書名 | A Lecture Entitled, Researches in Electric Telephony : Delivered Before the Society of Telegraph Engineers, October 31st, 1877 |
| 出版 | E. and F.N. Spon, 1878 |
| URL | http://books.google.com.hk/books?id=mFYuAQAAIAAJ&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |