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Paleoanthropology 98
Paleobotany 68
Paleogeography 18
Paleontology 1,398
Palladium 10
Paper Technology 19
Paranormal Phenomena 1,939
Particle Physics 327
Perfect Numbers 13
Periodic Table 62
Permaculture 31
Petroleum Engineering 95
Petrology 0
Pharmaceutical Technology 5
Pharmacology 64
Philosophy 6,412
Philosophy of Science 293
Phosphorus 10
Physical Anthropology 37
Physics 4,637
Physics, Qualitative 2
Pi 81
Planetariums 106
Planets 622
Plant Biology 721
Plant Pathology 117
Plant Physiology 75
Plasma Physics 321
Plastic 14
Platinum 10
Platinum Metals 1
Pluto 27
Plutonium 13
Policy about Science and Technology 50
Political Science 940
Pollution, Air 664
Pollution Prevention and Recycling 135
Pollution, Water 19
Polonium 10
Polyhedra and Polytopes 58
Polymers 80
Polyominoes 96
Population Studies 95
Potassium 10
Potential Theory 3
Poultry 105
Power Electronics 25
Prairies 17
Praseodymium 9
Precalculus 13
Primates 36
Prime Numbers 72
Probability 106
Promethium 9
Propulsion 56
Protactinium 8
Psychology 3,404
Public Policy 34
Pyrotechnics 91






 

 
 

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