TY - BOOK AU - Ghmhalter, Hans TI - POWER SUPPLY SYSTEMS IN COMMUNICATIONS ENGINEERING SN - 8122400981 U1 - 621.381044 PY - 0000/// CY - PB - KW - Power Resourses KW - Telecommunication--Power Supply N1 - Content : Pt.1. Principles.--Pt.2. Engineering And Planning Instructions ER -