| #21 | Acta Montana, Ser. AB, Geodynamics & Fuel, Carbon, Mineral Processing. -- Praha : Ústav struktury a mechaniky hornin AV ČR, 1992-2003. -- ISSN 1211-1576 |
| #22 | Acta Montanistica Slovaca. -- Košice : Fakulta BERG Technickej univerzity, 1996-. -- ISSN 1335-1788 |
| #23 | Acta Musei Moraviae, Scientiae Geologicae. -- Brno : Moravské zemské muzeum, 1997-. -- ISSN 1211-8796 |
| #24 | Acta physica Slovaca. -- Bratislava : Fyzikálny ústav SAV, 1973-. -- ISSN 0323-0465 print. -- ISSN 1336-040X online |
| #25 | Acta-Research Reports. -- Prague : Institute of Rock Structure and Mechanics, 2004-. -- ISSN 1214-9691 |
| #26 | Acta VŠFS. -- Praha : Vysoká škola finanční a správní. -- ISSN 1802-792X |
| #27 | Advanced composite materials. -- Utrecht : VSP, 1991-. -- ISSN 0924-3046 print. -- ISSN 1568-5519 online |
| #28 | Advanced materials and processes. -- Metals Park : American Society for Metals, 1985-. -- ISSN 0882-7958 |
| #29 | Advertising age. -- Chicago : Crain Communications, 1930-. -- ISSN 0001-8899 print. -- ISSN 1557-7414 online |
| #30 | AISE steel technology. -- Pittsburgh : Association of Iron and Steel Engineers, 1999-2003. -- ISSN 1528-5855 |