| #5951 | Rozprawy inzynierskie. -- Warszawa : Państwowe Wydawnictwo Naukowe, 1954-1992. -- ISSN 0035-9408 |
| #5952 | RS/magazine : for IBM client/server workstation users. -- Brookline : Computer Publishing Group, 1992-. -- ISSN 1061-0030 |
| #5953 | RTR : international journal for railway engineers. -- Darmstadt : Hestra-Verlag, 1969-2008. -- ISSN 0079-9548 |
| #5954 | RTR : european rail technology review. -- Hamburg : DVV Media Group, Eurailpress, 2008-2013. -- ISSN 1869-7801 |
| #5955 | Rubber Developments. -- Hertford : Malayan Rubber, 1947-. -- ISSN 0035-9483 |
| #5956 | Rubber chemistry and technology. -- Lancaster : American Chemical Society, 1928-. -- ISSN 0035-9475 print. -- ISSN 1943-4804 online |
| #5957 | Rubber world. -- Akron : Lippincott & Peto, 1928-. -- ISSN 0035-9572 |
| #5958 | Rudy. -- Praha : SNTL, Nakladatelství technické literatury, 1953-1991. -- ISSN 0483-5093 |
| #5959 | Rudy i Metale Nieżelazne. -- Warszawa : SIGMA NOT, 1956-. -- ISSN 0035-9696 |
| #5960 | Rundfunktechnische Mitteilungen. -- Norderstedt : Mensing, 1957-2001. -- ISSN 0035-9890 |