TY - BOOK T1 - Telecommunications :a picture of change : DA - 1981. CY - Minneapolis, MN : AU - Alnes, Stephen. CN - TK5101 CN - TK5101 PB - Upper Midwest Council, PP - Minneapolis, MN : PY - 1981. N1 - Cover title. N1 - May 1981. ID - 40269 KW - Telecommunication TI - Telecommunications :a picture of change : ER -