| #121 | Altenburger naturwissenschaftliche Forschungen. -- Altenburg : Mauritianum, 1981-. -- ISSN 0232-5381 |
| #122 | The American biology teacher. -- Washington : National association of biology teachers, 1938-. -- ISSN 0002-7685 print. -- ISSN 1938-4211 online |
| #123 | American journal of human biology. -- New York : Liss, 1989-. -- ISSN 1042-0533 print. -- ISSN 1520-6300 online |
| #124 | American journal of human genetics. -- Chicago : University of Chicago, 1949-. -- ISSN 0002-9297 print. -- ISSN 1537-6605 online |
| #125 | American journal of respiratory cell and molecular biology. -- New York : American Lung Association, 1989-. -- ISSN 1044-1549 print. -- ISSN 1535-4989 online |
| #126 | American midland naturalist : an international journal of ecology, evolution and environment. -- Notre Dame : University of Notre Dame, 1909-. -- ISSN 0003-0031 print. -- ISSN 1938-4238 online |
| #127 | American Museum novitates. -- New York : American Museum of Natural History, 1921-. -- ISSN 0003-0082 print. -- ISSN 1937-352X online |
| #128 | The American naturalist. -- Chicago : The University of Chicago Press, 1867-. -- ISSN 0003-0147 print. -- ISSN 1537-5323 online |
| #129 | Amino acids. -- Wien : Springer, 1991-. -- ISSN 0939-4451 print. -- ISSN 1438-2199 online |
| #130 | Amtliche Pflanzenschutzbestimmungen. -- Berlin : Biologische Bundesanstalt für Land- und Forstwirtschaft, 1951-2007. -- ISSN 0342-9172 |