I 15-43. REFERENCES: Any of the following publications which are available can be used for further reference on this subject. a. American Electrician's Handbook, by Terrel Croft, published by McGraw Hill. safety Rules for the Installation and Maintenance of Electric Communication Lines, Handbook No. 32, from Superintendent of Documents, Government Printing Office, Washington, D. C. War Department Technical Manual T M 5-680C, Overhead Distribution Systems, Repairs and Utilities, Electrical Facilities. 15-9