| #921 | Clinical neuroscience research. -- Amsterdam : Elsevier, 2000-. -- ISSN 1566-2772 print. -- ISSN 1873-779X online |
| #922 | Clinical nutrition. -- Edinburgh : Churchill Livingstone, 1982-. -- ISSN 0261-5614 print. -- ISSN 1532-1983 online |
| #923 | Clinical nutrition supplements. -- Oxford : Elsevier, 2004-. -- ISSN 1744-1161 print. -- ISSN 1878-3368 online |
| #924 | Clinical obstetrics and gynecology. -- Hagerstown : Lippincott, 1958-. -- ISSN 0009-9201 print. -- ISSN 1532-5520 online |
| #925 | Clinical oncology. -- London : Springer, 1989-. -- ISSN 0936-6555 print. -- ISSN 1433-2981 online |
| #926 | Clinical oral implants research. -- Oxford : Blackwell, 1994-. -- ISSN 0905-7161 print. -- ISSN 1600-0501 online |
| #927 | Clinical oral investigations. -- Berlin : Springer, 1997-. -- ISSN 1432-6981 print. -- ISSN 1436-3771 online |
| #928 | Clinical orthodontics and research. -- Copenhagen : Munksgaard International Publishers, 1998-2001. -- ISSN 1397-5927 print. -- ISSN 1600-0544 online |
| #929 | Clinical orthopaedics and related research. -- Philadelphia : Lippincott, 1963-. -- ISSN 0009-921X print. -- ISSN 1528-1132 online |
| #930 | Clinical Osteology. -- Brno : : Facta Medica, s.r.o., 2018-. -- ISSN 2571-1326 |