| #1261 | Trita-TMH. -- Stockholm : Royal Institute of Technology, 1994-. -- ISSN 1104-5787 |
| #1262 | Trudy Fizičeskogo instituta im. P. N. Lebedeva. -- Moskva : Nauka, 1964-1993. -- ISSN 0203-5820 |
| #1263 | U.S.S.R. computational mathematics and mathematical physics. -- Oxford : Pergamon, 1962-1992. -- ISSN 0041-5553 print. -- ISSN 1878-2930 online |
| #1264 | Ukrajins'kyj fizyčnyj žurnal. -- Kijev : Naukova Dumka. -- ISSN 0503-1265 |
| #1265 | Ultramicroscopy. -- Amsterdam : Elsevier, 1975-. -- ISSN 0304-3991 print. -- ISSN 1879-2723 online |
| #1266 | Ultrasonic imaging : an international journal. -- San Diego : Academic Press, 1979-. -- ISSN 0161-7346 print. -- ISSN 1096-0910 online |
| #1267 | Ultrasonics. -- Guildford : Butterworth Scientific, 1963-. -- ISSN 0041-624X print. -- ISSN 1874-9968 online |
| #1268 | Ultrasonics sonochemistry. -- Oxford : Butterworth-Heinemann, 1994-. -- ISSN 1350-4177 print. -- ISSN 1873-2828 online |
| #1269 | Uspehi fizičeskih nauk. -- Moskva : Nauka, 1918-. -- ISSN 0042-1294 print. -- ISSN 1996-6652 online |
| #1270 | Uspechi mechaniki. -- Warszawa : Gosudarstvennoe nauchnoe izdatel'stvo, 1978-1991. -- ISSN 0137-3722 |