And quantitative data collection methods are used to store, query, from a sample of the water system's water is mountains. 56, and water users, water systems, another region 21.
Relevant and quantitative data collection methods were collected from a sample of the water system, water supply and water users mount 56 regional water supply system, another 21 cases.
Relevant and quantitative data using statistical samples from a mountain water use water supply system 56 cases. Regional water supply system and water users more 21 cases.