Economic aspects History 2 Agriculture 1 Benchmarking (Management) 1 By-products 1 Capitalism 1 Civil society 1 meer ... Disinfection 1 Drought relief 1 Droughts 1 Economics 1 Enlightenment 1 Environmental permits 1 Industrialization 1 Industries 1 Intellectual life 1 Maintenance and repair 1 Management 1 Management information systems 1 Mathematical models 1 Microbial contamination 1 Municipal water supply 1 Planning 1 Political sociology 1 Prices 1 Privatization 1 Purification 1 Rates 1 Regional planning 1 Sanitary engineering 1 minder ...