| #201 | Research in Astronomy and Astrophysics. -- Beijing : Science Press, 2009-. -- ISSN 1674-4527 |
| #202 | Rocznik astronomiczny. -- ISSN 0209-0341 |
| #203 | Rocznik Astronomiczny Obserwatorium Krakowskiego, Dodatek Miedzynarodowy. -- Warszawa : Panstwowe Wydawnictwo Naukowe, 1923-. -- ISSN 0075-7047 |
| #204 | Rotor & wing. -- Potomac : Phillips Business Information. -- ISSN 1066-8098 |
| #205 | Russian geology and geophysics. -- New York : Allerton Press, 1992-. -- ISSN 1068-7971 print. -- ISSN 1878-030X online |
| #206 | Russian journal of mathematical physics. -- Moscow : Nauka Interperiodica, 1993-. -- ISSN 1061-9208 print. -- ISSN 1531-8621 online |
| #207 | Říše hvězd. -- Praha : Panorama, 1920-2001. -- ISSN 0035-5550 |
| #208 | SAE Transactions. -- Spojené státy americké - United States : New York : Society of Automotive Engineers, 1928-2007. -- ISSN 0096-736X |
| #209 | Satellite broadband : The cutting edge of satellite solutions. -- Overland Park : Intertec, 2000-2002. -- ISSN 1531-0434 |
| #210 | Satellite communications. -- Englewood : Argus Business, 1977-2000. -- ISSN 0147-7439 |