Physical chemistry 262 PHYSICAL CHEMISTRY 105 Chemistry 69 Physical Chemistry 55 Theoretical chemistry 31 ANNUAL REVIEW OF PHYSICAL CHEMISTRY 22 PRINCIPLES OF PHYSICAL CHEMISTRY 21 Catalysis 15 Thermodynamics 13 Ionisation 11 Isotopes 11 physical chemistry 10 Photochemistry 9 Thermochemistry 9 Applied physical chemistry 8 INTERNATIONAL CRITICAL TABLES OF NUMERICAL DATA PHYSICS CHEMISTRY AND TECHNOLOGY 8 Photo chemistry 8 Polymers 8 photochemistry 8 A TEXTBOOK OF PHYSICAL CHEMISTRY 7 ADVANCED PHYSICAL CHEMISTRY 7 Organic chemistry 7 Gases 6 Theoritical chemistry 6 catalysis 6 ADVANCED PRACTICAL PHYSICAL CHEMISTRY 5 AN ADVANCED TREATISE ON PHYSICAL CHEMISTRY 5 Chemical Equilibrium 5 Inorganic chemistry 5 Nuclear Chemistry 5