| #541 | Memoirs of the American Mathematical Society. -- Providence : American Mathematical Society, 1950-. -- ISSN 0065-9266 print. -- ISSN 1947-6221 online |
| #542 | Memoirs of the College of Science, University of Kyoto, Series A, Mathematics. -- Rio de Janeiro : Laboratórios Silva Araujo Roussel, S.A., 1950-1960. -- ISSN 0368-8887 |
| #543 | Memoirs of the Faculty of Science Kochi University, Ser. A, Mathematics. -- Kochi : Kochi University, Faculty of Science, Department of Mathematics, 1980-2004. -- ISSN 0389-0252 |
| #544 | Memoirs of the Faculty of Science, Kyushu University. -- Fukuoka : Kyushu University. Faculty of Science, 1940-1993. -- ISSN 0373-6385 print. -- ISSN 1883-2172 online |
| #545 | Memoirs on Differential Equations and Mathematical Physics. -- Tbilisi : GCI Publishing House, 1994-. -- ISSN 1512-0015 |
| #546 | Metody diskretnogo analiza v sinteze realizacij bulevyh funkcij. -- Novosibirsk : Institut matematiki, 1976-. -- ISSN 0136-1228 |
| #547 | Metra. -- Paris : Société d’économie et de mathématiques appliquées, 1962-1975. -- ISSN 0026-1327 |
| #548 | Metrika. -- Heidelberg : Physica Verlag, 1958-. -- ISSN 0026-1335 print. -- ISSN 1435-926X online |
| #549 | Metron : rivista internazionale di statistica. -- Roma : Instituto di statistica e ricerca sociale, 1920-. -- ISSN 0026-1424 |
| #550 | The Michigan mathematical journal. -- Ann Arbor : The University of Michigan, 1952-. -- ISSN 0026-2285 |