| Atoms, men and stars by Rogers D. Rusk - 1937 - 289 pages |
| Atoms, Pneuma, and Tranquillity - 2005 - 320 pages |
| Atti della Società dei naturalisti e matematici di Modena by Società dei naturalisti e matematici di Modena - 1972 |
| Atti della Società dei naturalisti e matematici di Modena by Società dei naturalisti e matematici di Modena - 1968 |
| Attitudes of scientists and engineers about their government employment by Maxwell Graduate School of Citizenship and Public Affairs, United States. Office of Naval Research - 1950 |
| Augustine to Galileo by Alistair Cameron Crombie - 1961 - 660 pages |
| Augustine to Galileo by Alistair Cameron Crombie - 1961 - 728 pages |
| Augustine to Galileo by Alistair Cameron Crombie - 1953 - 436 pages |
| Aus dem stromgebiet des Qyzyl-Yrmag (Halys). by Hermann von Flottwell - 1895 - 55 pages |
| Australia's Fossil Heritage by The Australian Heritage Council - 2012 - 200 pages |
| Australian Science in the Making - 1990 - 444 pages |
| Australian Science in the Making - 1989 - 448 pages |
| Autobiography of Sir George Biddell Airy by George Biddell Airy - 2010 - 436 pages |
| Automàtica i sostenibilitat by Antoni Grau Saldes - 2005 - 120 pages |
| Automàtica i sostenibilitat by Antoni Grau Saldes - 2005 - 120 pages |
| Avicenna - 1952 - 128 pages |