Government policy 52 Geology 45 Statistics 43 Periodicals 36 Economic aspects 33 Research 33 Finance 32 Law and legislation 32 Officials and employees 29 Safety measures 29 Management 27 Maps 26 Environmental aspects 25 Handbooks, manuals, etc 23 Civil service 22 Services for 22 Standards 22 Employment 21 Education, Higher 20 Occupational training 18 Politics and government 18 Congresses 17 Transportation 17 Education 16 Evaluation 16 Aboriginal Australians 15 Personnel management 15 Training of 15 Appropriations and expenditures 14 Auditing 14