TA Engineering (General). Civil engineering (General) 73 HD28 Management. Industrial Management 51 TD Environmental technology. Sanitary engineering 42 Malaysia 30 Environmental policy and economic development. Sustainable development. Environmental management 28 TP Chemical technology 24 HD1394-1394.5 Real estate management 21 GE Environmental Sciences 20 Enviromental management 15 T Technology (General) 15 NA Architecture 14 TJ Mechanical engineering and machinery 14 Travel and state. Tourism 10 Environmental conditions. Environmental quality. Environmental indicators. Environmental degradation 9 HD Industries. Land use. Labor 9 Management. Industrial Management 9 New Zealand 9 TH Building construction 9 TK Electrical engineering. Electronics Nuclear engineering 9 HD28-70 Management. Industrial Management 8 Municipal refuse. Solid wastes 8 Sustainability 8 Environmental matters 7 Environmental protection 7 Financial management. Business finance. Corporation finance 7 H Social Sciences (General) 7 Hospitality industry. Hotels, clubs, restaurants, etc. Food service 6 Marketing 6 TH1-9745 Building construction 6 Travel and the state. Tourism 6