http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
xi, 192 páginas : ilustraciones ; 27 cm.
Water supply hydrology -- Groundwater sources -- Surface water sources -- Emergency and alternative water sources -- Use and conservation of water -- Water quality -- Water source protection
Principles and practices of water supply operations