| #1841 | MaxPlanckForschung : Das Wissenschaftsmagazin der Max-Planck-Gesellschaft, Firemní časopis [německá verze]. -- München : Max-Planck-Gesellschaft, 1999-. -- ISSN 1616-4172 |
| #1842 | Meander. -- Warszawa : Państwowe Wydawnictwo Naukowe, 1946-. -- ISSN 0025-6285 |
| #1843 | Measurement & control news. -- Pittsburgh : Measurement & Data Corp., 1977-2001. -- ISSN 0194-1461 |
| #1844 | Meddelanden fran Lunds universitets historiska museum. -- Lund, Stockholm : Institute of Archeology, 1930-1995. -- ISSN 0458-4767 |
| #1845 | Mediaeval Scandinavia. -- Odense : Odense University Press, 1968-. -- ISSN 0076-5864 |
| #1846 | Mediaeval studies. -- Toronto : Pontifical Institute of Medieval Studies, 1939-. -- ISSN 0076-5872 |
| #1847 | Mediaevalia historica Bohemica. -- Praha : Historický ústav AV ČR, 1991-. -- ISSN 0862-979X |
| #1848 | Medical journal of the Osaka University. -- Osoka : Osaka University Medical School, 1949-. -- ISSN 0030-6169 |
| #1849 | Medycyna doswiadczalna i mikrobiologia. -- Warszawa : Państwowy Zakład Higieny, 1949-. -- ISSN 0025-8601 |
| #1850 | Meetings on atomic energy : a quarterly world-wide list of conferences. -- Wien : International Atomic Energy Agency, 1969-. -- ISSN 0047-6641 |