Geography Human geography 32 Research & information: general 16 Sociology 10 Central government policies 9 Earth sciences 5 The environment 5 Earth sciences, geography, environment, planning 3 Environmental science, engineering & technology 3 Physical geography & topography 3 Society & social sciences 3 Archaeology 2 Business mathematics & systems 2 City & town planning - architectural aspects 2 Computer networking & communications 2 Cultural studies 2 Databases 2 Ecological science, the Biosphere 2 Environmental management 2 History 2 Information technology: general issues 2 International maritime law 2 Museology & heritage studies 2 Regional & area planning 2 Sales & marketing management 2 Social issues & processes 2 21st century history: from c 2000 - 1 Acoustic & sound engineering 1 Agricultural science 1 Applied ecology 1