| #5811 | Publish!. -- San Francisco : Integrated Media, 1986-2001. -- ISSN 0897-6007 |
| #5812 | Pumpen + Kompressoren. -- Essen : Vulkan-Verlag, 1995-. -- ISSN 0947-0654 |
| #5813 | Pure and applied chemistry. -- Oxford : Blackwell, 1960-. -- ISSN 0033-4545 print. -- ISSN 1365-3075 online |
| #5814 | PV international plastics magazine. -- Heidelberg : Zechner & Hüthig, 1991-. -- ISSN 0941-8938 |
| #5815 | P6-Téma. -- Český Těšín : Poradce, 1995-2004. -- ISSN 1211-2003 |
| #5816 | QST : devoted entirely to Amateur Radio. -- Newington : The American Radio Relay Leaque, 1915-. -- ISSN 0033-4812 |
| #5817 | Quality progress. -- Milwaukee : American Society for Quality Control, 1968-. -- ISSN 0033-524X |
| #5818 | Quark. -- Bratislava : Perfekt, 1995-. -- ISSN 1335-4000 print. -- ISSN 1337-8422 online |
| #5819 | Quarry management. -- Nottingham : Quarry Managers' Journal, 1984-. -- ISSN 0950-9526 |
| #5820 | Quarry manager´s journal. -- London : Quarry manager´s journal, 1918-1974. -- ISSN 0033-5274 |