| #6451 | Reactor Technology. -- Spojené státy americké : Washington : U.S. Atomic Energy Commission, 1970-1973 |
| #6452 | Realit. -- Praha : Mladá fronta, 1994-. -- ISSN 1210-8308 |
| #6453 | Réalités industrielles. -- Paris : Eska, 1989-. -- ISSN 1148-7941 |
| #6454 | Realizace staveb : stavební materály - výrobky - technologie - konstrukce. -- Praha : Jaga Media, 2006-. -- ISSN 1802-0631 |
| #6455 | Recent Trends in Charged Particle Optics and Surface Physics Instrumentation : proceedings of the ... international seminar, held in Skalsky dvůr near Brno, Czech Republic, from ... / organised by the. -- Česká Republika : [Prague] : Czechoslovak Microscopy Society, 1988 Prague : Institute of Scientific Instruments The Czech Academy of Scie, 2002- |
| #6456 | Record. -- Murray Hill : AT & T Bell Laboratories, 1983-1986. -- ISSN 0749-8152 |
| #6457 | Record and index / American Society of Mechanical Engineers. -- Spojené státy americké : New York : American Society of Mechanical Engineers,, 1928-1930 |
| #6458 | Record od Chemical Progress. -- Spojené státy americké : New York, 1962-1971 |
| #6459 | Records of the Geological Survey of India. -- Západní Bengálsko : Calcutta : vl. n., 1868-1897 |
| #6460 | Recueil des travaux chimiques des Pays-Bas. -- Nizozemsko : Leiden : Sijthoff, 1882-1896 |