Fullformexpand.com, 2026. "USDW." Accessed February 25, 2026. https://www.fullformexpand.com/usdw/underground-sources-of-drinking-water.
"USDW." (n.d.). Fullformexpand.com. Retrieved February 25, 2026, from https://www.fullformexpand.com/usdw/underground-sources-of-drinking-water.
USDW. (2026). Fullformexpand.com. Available at: https://www.fullformexpand.com/usdw/underground-sources-of-drinking-water (Accessed: 25 February 2026).