62 Engineering
628 Sanitary engineering
628.0287 Environmental engineering--measurement 628.092 Environmental engineers 628.1 Water supply 628.2 Sewers 628.3 Sewage treatment and disposal 628.4 Waste technology, public toilets, street cleaning 628.5 Pollution control technology and industrial sanitation engineering 628.7 Sanitary engineering for rural and sparsely populated areas 628.9 Other branches of sanitary and municipal engineering
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