Project management--PERT/CPM 161 Peace 117 Pure sciences 104 History 55 Mathematics 44 Pure sciences - Dictionaries & encyclopedias 42 Lecture Notes in Pure and Applied Mathematics 38 History and criticism 32 Peace-building 32 Physics 30 War 30 Economics 26 Women 25 Quantum theory 24 peace 24 Mathematical analysis 20 Novel 20 Parsees 20 Pure sciences - Dictionaries -- encyclopedias 20 Social conditions 20 Philosophy 19 Conflict management 18 Perl (Computer program language) 18 Social aspects 18 Strategic management 18 Literature 16 Psychology 16 Criticism and interpretation 15 Pure sciences -- Dictionaries & encyclopedias 15 Topology 15