| #1531 | Roczniki Chemii. -- Warszawa : Państwowe Wydawnictwo Naukowe, 1921-1977. -- ISSN 0035-7677 |
| #1532 | Romania petrochemicals report. -- London : Business Monitor International, 2005-. -- ISSN 1749-2416 |
| #1533 | Rossijskij himičeskij žurnal. -- Moskva : Èlektrohimiâ, 1993-. -- ISSN 1024-6215 print. -- ISSN 1819-3986 online |
| #1534 | RS/magazine : for IBM client/server workstation users. -- Brookline : Computer Publishing Group, 1992-. -- ISSN 1061-0030 |
| #1535 | Rubber Developments. -- Hertford : Malayan Rubber, 1947-. -- ISSN 0035-9483 |
| #1536 | Rubber chemistry and technology. -- Lancaster : American Chemical Society, 1928-. -- ISSN 0035-9475 print. -- ISSN 1943-4804 online |
| #1537 | Rubber world. -- Akron : Lippincott & Peto, 1928-. -- ISSN 0035-9572 |
| #1538 | Russia petrochemicals report. -- London : Business Monitor International, 2005-. -- ISSN 1749-2424 |
| #1539 | Russian chemical bulletin. -- New York : Consultants Bureau, 1993-. -- ISSN 1066-5285 print. -- ISSN 1573-9171 online |
| #1540 | Russian journal of applied chemistry. -- Moscow : Nauka, 1993-. -- ISSN 1070-4272 print. -- ISSN 1608-3296 online |