| #1261 | Transactions of the IRE Professional Group on Microwave Theory and Techniques. -- New York : Institute of Radio Engineers, 1953-1955. -- ISSN 0276-1173 print. -- ISSN 2331-1614 online |
| #1262 | Transactions of the IRE Professional Group on Nuclear Science. -- New York : Institute of Radio Engineers, 1954. -- ISSN 0277-6278 print. -- ISSN 2374-9822 online |
| #1263 | Transactions of the IRE Professional Group on Ultrasonics Engineering. -- New York : Institute of Radio Engineers, 1954. -- ISSN 0277-626X print. -- ISSN 2162-0679 online |
| #1264 | Transactions of the Japan Society of Mechanical Engineers. -- Tokio : Japan Society of Mechanical Engineers, 1930-1978. -- ISSN 0029-0270 |
| #1265 | Transactions of the Optical Society. -- London : Optical Society, 1899-1932. -- ISSN 1475-4878 |
| #1266 | Transactions of the Society of Rheology. -- New York : John Wiley & Sons, 1957-1977. -- ISSN 0038-0032 |
| #1267 | Translational materials research. -- Bristol : IOP Publishing, 2014-. -- ISSN 2053-1613 online |
| #1268 | Tribologie und Schmierungstechnik. -- Hannover : Curt R.Vincentz Verlag, 1986-. -- ISSN 0724-3472 |
| #1269 | Tribotechnické informace. -- Praha : Tes Praha, 1997-2006. -- ISSN 1212-0081 |
| #1270 | Trita-TMH. -- Stockholm : Royal Institute of Technology, 1994-. -- ISSN 1104-5787 |