| #651 | Kybernetika. -- Praha : Institute of Inf. Theory and Automation of the ASCS, 1965-. -- ISSN 0023-5954 |
| #652 | Kyoto journal of mathematics. -- Kyoto : Kyoto University, 2010-. -- ISSN 2156-2261 |
| #653 | Kyungpook mathematical journal. -- Daegu : Kyungpook national university, 1999-. -- ISSN 1225-6951 |
| #654 | Kyushu journal of mathematics. -- Fukuoka : Kyushu University. Graduate School of Mathematics, 1994-. -- ISSN 1340-6116 print. -- ISSN 1883-2032 online |
| #655 | Kyushu University. Research Institute of Applied Mechanics. -- Fukuoka : Kyushu University, 1952-1999. -- ISSN 0030-7734 |
| #656 | Latvijskij matematičeskij ežegodnik. -- Riga, 1966-1989. -- ISSN 0321-2270 |
| #657 | Lecture notes in mathematics. -- Heidelberg ; Berlin : Springer, 1964-. -- ISSN 0075-8434 print. -- ISSN 1617-9692 online |
| #658 | Letters in mathematical physics. -- Dordrecht : Reidel, 1975-. -- ISSN 0377-9017 print. -- ISSN 1573-0530 online |
| #659 | The library quarterly. -- Chicago : University of Chicago Library, 1931-. -- ISSN 0024-2519 print. -- ISSN 1549-652X online |
| #660 | Libri : international library review and IFLA Communications FIAB. -- München : Saur, 1950-. -- ISSN 0024-2667 print. -- ISSN 1865-8423 online |