| Author's List |
| title | creator | language | description | tableOfContents | contributor | subject | created |
| Cyclopedia of Telephony and Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. | American School of Correspondence | en | 2005-04-14 | ||||
| Cyclopedia of Telephony and Telegraphy, Vol. 2 A General Reference Work on Telephony, etc. etc. | American School of Correspondence | en | 2010-08-15 |