00652nam a2200193Ia 4500 CTU_82586 210402s9999 xx 000 0 und d 621.38 B531 Bernstein, Jeremy Three degrees above zero : Jeremy Bernstein New York Charles Scribner's Son 1984 The book includes 4 parts: bits, the solid state, telephony and three degrees above zero. Phòng thí nghiệm điện thoại Bell,Bell Telephone Laboratories QHieu(sửa) Trung tâm Học liệu Trường Đại học Cần Thơ