| Prologue | PROLOGUE | 0033-1031 |
| Promet-Traffic & Transportation | PROMET-ZAGREB | 0353-5320 |
| Prometeica-Revista de Filosofia y Ciencias | PROMETEICA-REVISTA DE FILOSOFIA Y CIENCIAS | 1852-9488 |
| Prometheus | PROMETHEUS | 0810-9028 |
| Prometheus (Italy) | | 0391-2698 |
| Prooftexts - Journal of Jewish Literature History | | 0272-9601 |
| Propagation of Ornamental Plants | PROPAG ORNAM PLANTS | 1311-9109 |
| Propellants, Explosives, Pyrotechnics | PROPELL EXPLOS PYROT | 0721-3115 |
| Property Management | PROPERTY MANAGEMENT | 0263-7472 |
| Propiedad Intelectual | PROPIEDAD INTELECTUAL | 1316-1164 |
| Propositos y Representaciones | PROPOSITOS Y REPRESENTACIONES | 2307-7999 |
| Propulsion and Power Research | PROPULSION AND POWER RESEARCH | 2212-540X |
| Prose Studies-History Theory Criticism | | 1743-9426 |
| Prospectiva | PROSPECTIVA | 0122-1213 |
| Prospects | PROSPECTS | 0033-1538 |
| Prospero: a Journal of New Thinking in Philosophy of Education | | 1358-6785 |
| Prospettiva | | 0394-0802 |
| Prostaglandins and Other Lipid Mediators | PROSTAG OTH LIPID M | 1098-8823 |
| Prostaglandins Leukotrienes and Essential Fatty Acids | PROSTAG LEUKOTR ESS | 0952-3278 |
| Prostate | PROSTATE | 0270-4137 |
| Prostate Cancer | PROSTATE CANCER | 2090-3111 |
| Prostate Cancer and Prostatic Diseases | PROSTATE CANCER P D | 1365-7852 |
| Prostate International | PROSTATE INTERNATIONAL | 2287-8882 |
| Prosthetics and Orthotics International | PROSTHET ORTHOT INT | 0309-3646 |
| Prostor | PROSTOR | 1330-0652 |
| Protection and Control of Modern Power Systems | PROTECTION AND CONTROL OF MODERN POWER SYSTEMS | 2367-2617 |
| Protection of Metals | PROT MET+ | 0033-1732 |
| Protection of Metals and Physical Chemistry of Surfaces | PROT MET PHYS CHEM+ | 2070-2051 |
| Protée: Théories et Pratiques Sémiotiques | | 0300-3523 |
| Protein & Cell | PROTEIN & CELL | 1674-800X |
| Protein and Peptide Letters | PROTEIN PEPTIDE LETT | 0929-8665 |
| Protein Engineering, Design and Selection | PROTEIN ENG DES SEL | 1741-0126 |
| Protein Expression and Purification | PROTEIN EXPRES PURIF | 1046-5928 |
| Protein Journal | PROTEIN J | 1572-3887 |
| Protein Science | PROTEIN SCI | 0961-8368 |
| Proteins: Structure, Function and Genetics | PROTEINS | 0887-3585 |
| Proteome Science | PROTEOME SCI | 1477-5956 |
| Proteomes | PROTEOMES | 2227-7382 |
| Proteomics | PROTEOMICS | 1615-9853 |
| Proteomics - Practical Proteomics | PROTEOMICS - PRACTICAL PROTEOMICS | 1862-7595 |
| Proteomics Clinical Applications | PROTEOM CLIN APPL | 1862-8346 |
| Proteomics Insights | PROTEOMICS INSIGHTS | 1178-6418 |
| Protetyka stomatologiczna | | 0033-1783 |
| Proteus | PROTEUS | 0889-6348 |
| Protist | PROTIST | 1434-4610 |
| Protistology | PROTISTOLOGY | 1680-0826 |
| Protoplasma | PROTOPLASMA | 0033-183X |
| Provider (Washington, D.C.) | PROVIDER (WASHINGTON, D.C.) | 0888-0352 |
| Provincia | PROVINCIA | 1317-9535 |
| Proyecciones | PROYECCIONES | 0716-0917 |
