TY - BOOK ID - 135458682 TI - Electronic switching : central office systems of the world PY - 1976 SN - 0879420790 0879420804 PB - New York (N.Y.): IEEE DB - UniCat KW - Telephone stations KW - Telephone switching systems, Electronic UR - https://www.unicat.be/uniCat?func=search&query=sysid:135458682 AB - ER -