- Open Chemistry
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- OphthaTherapy: terapie w okulistyce
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- Orchid Review
- Organisms Diversity & Evolution
- Organizacja i Zarządzanie
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- Orońsko: kwartalnik rzeźby
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- Oryx
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- Oxidation Communications
- Oxidative Medicine and Cellular Longevity
- Pain Management Nursing
- Pakistan Journal of Agricultural Sciences (d. Faisalabad: Society for the Advancement of Agricultural Sciences)
- PAKISTAN JOURNAL OF BOTANY
- Pakistan Journal of Medical Sciences
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- Palaeogeography, Palaeoclimatology, Palaeoecology
- Pamiętnik Puławski
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- Pathogens
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- Peatlands International
- Pediatria Współczesna
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- Philippine Agricultural Scientist
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- PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
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- Physical Geography
- Physical Review B
- Physicochemical Problems of Mineral Processing
- Physiologia Plantarum (København.1948)
- Physiology and Molecular Biology of Plants
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