#21 | Belarus telecommunications report. -- London : Business Monitor International, 2009-. -- ISSN 1757-1529 |
#22 | Belgium telecommunications report. -- London : Business Monitor International, 2006-. -- ISSN 1752-4202 |
#23 | Bell Laboratories record. -- UNITED STATES : [Murray Hill, N.J., etc., Bell Telephone Laboratories], 1925-1983. -- ISSN 0005-8564 |
#24 | Bell Labs technical journal. -- UNITED STATES : Murray Hill, NJ : Lucent Technologies, [1996]-, 1996-. -- ISSN 1089-7089 print. -- ISSN 1538-7035 online |
#25 | Bell Telephone magazine. -- UNITED STATES : [New York, American Telephone and Telegraph Co., etc.], 1941-. -- ISSN 0096-8692 |
#26 | Bell telephone quarterly. -- UNITED STATES : New York [Information Dept.] American Telephone and Telegraph Co., 1922-1940. -- ISSN 0270-5869 |
#27 | Boards. -- Toronto : Brunico Communications, 1999-2010. -- ISSN 1488-6286 |
#28 | Brazil telecommunications report. -- London : Business Monitor International, 2005-. -- ISSN 1748-4421 |
#29 | British telecommunications engineering. -- London : Institution of British Telecommunications Engineers, 1982-1999. -- ISSN 0262-401X |
#30 | Broadcast. -- Bordon : Arrowhead, 1973-. -- ISSN 0040-2788 |