TY - BOOK AU - Perkins,W.T. TI - Elementary telecommunication examination guide U1 - 621.38076 PY - 1961/// CY - London PB - George Newnes KW - Telecommunication KW - Electronic measurements KW - Telecommunication lines KW - Electric lines KW - Equipments and supplies N1 - Includes index; Covering the city and guids of London Institute examination in elementary telecommunication practice and telecommunication principles ER -