| #511 | Asian journal of surgery. -- Hong Kong : University of Hong Kong, 1989-. -- ISSN 1015-9584 print. -- ISSN 0219-3108 online |
| #512 | Asian nursing research. -- Seoul : Korean society of nursing science, 2007-. -- ISSN 1976-1317 |
| #513 | Asian Pacific journal of tropical medicine. -- Singapore : Elsevier, 2008-. -- ISSN 1995-7645 |
| #514 | Assistive technology. -- Philadelphia : Taylor & Francis, 1989-. -- ISSN 1040-0435 print. -- ISSN 1949-3614 online |
| #515 | Asthma. -- Newton : LifeLong Publications, 1996-. -- ISSN 1088-0712 print. -- ISSN 1558-1543 online |
| #516 | Ateroskleróza. -- Košice : Huma-Lab CS, 1997-. -- ISSN 1335-2253 |
| #517 | Atheroreview. -- Brno : Facta Medica, s.r.o, 2016-. -- ISSN 2464-6555 |
| #518 | Atherosclerosis, Supplement. -- Amsterdam : Elsevier, 1991-. -- ISSN 1567-5688 print. -- ISSN 1878-5050 online |
| #519 | Atherosclerosis. -- Amsterdam : Elsevier, 1970-. -- ISSN 0021-9150 print. -- ISSN 1879-1484 online |
| #520 | ATLA : Alternatives to laboratory animals. -- Nottingham : Fund for the Replacement of Animals in Medical Experiments, 1981-. -- ISSN 0261-1929 |