| #1361 | Oesterreichische Chemiker-Zeitung. -- Wien : Verlag der Öst. Chemiker-Zeitung, 1898-1941. -- ISSN 0369-7061 |
| #1362 | Oils & fats international. -- Redhill : International Trade Publications., 1985-. -- ISSN 0267-8853 |
| #1363 | Organic & biomolecular chemistry : An international journal of all areas of organic, physical organic and biomolecular organic chemistry. -- Cambridge : Royal Society of Chemistry, 2003-. -- ISSN 1477-0520 print. -- ISSN 1477-0539 online |
| #1364 | Organic letters. -- Columbus : American Chemical Society, 1999-. -- ISSN 1523-7060 print. -- ISSN 1523-7052 online |
| #1365 | Organic preparations and procedures international : the new journal for organic synthesis. -- Newton Highlands : Organic Preparations and Procedures, 1969-. -- ISSN 0030-4948 |
| #1366 | Organic process research & development. -- Washington : American Chemical Society, 1997-. -- ISSN 1083-6160 print. -- ISSN 1520-586X online |
| #1367 | Organometallics. -- Washington : American Chemical Society, 1982-. -- ISSN 0276-7333 print. -- ISSN 1520-6041 online |
| #1368 | Origins of life and evolution of the biosphere. -- Dordrecht : Reidel, 1984-. -- ISSN 0169-6149 print. -- ISSN 1573-0875 online |
| #1369 | Österreichische Chemie-Zeitschrift. -- Wien : Verein Osterreichischer Chemiker. -- ISSN 0379-5314 |
| #1370 | Österreichische Chemiker-Zeitung. -- Wien : Springer, 1947-1967. -- ISSN 0258-4336 |