| #5041 | Measurement and control. -- London : Institute of Measurement and Control, 1968-. -- ISSN 0020-2940 |
| #5042 | MECCA. -- Praha : ČVUT, 2002-. -- ISSN 1214-0821 |
| #5043 | Media tenor. -- Ostrava : InnoVatio, 2002-2003. -- ISSN 1214-990X |
| #5044 | Medical solutions, [německá verze]. -- Erlangen : Siemens, 2003-. -- ISSN 1614-5569 |
| #5045 | Medien-Bulletin : Medienbusiness - broadcast - new media. -- Köln : Kellerer & Partner, 1982-. -- ISSN 0723-2128 |
| #5046 | Meetings on atomic energy : a quarterly world-wide list of conferences. -- Wien : International Atomic Energy Agency, 1969-. -- ISSN 0047-6641 |
| #5047 | MegaLink. -- Aarau : AT-Zeitschriftenverlag, 1994-2004. -- ISSN 1420-5661 |
| #5048 | Megalink. -- Aarau : AZ Fachverlage AG, 2009-2015. -- ISSN 1662-9558 |
| #5049 | MegaLink precision : Elektronik + Automation. -- Aarau : AZ Fachverlage, 2004-2008. -- ISSN 1662-3339 |
| #5050 | Mechanical engineering. -- New York : American Society of Mechanical Engineers, 1919-. -- ISSN 0025-6501 |