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gIrrigation techniquesh. USGS. 2005N128{
Royal Engineers Museum — 19th century Irrigation in India
International Commission on Irrigation and Drainage (ICID)
Irrigation at the Water Quality Information Center, U.S. Department of Agriculture
AQUASTAT — FAO's global information system on water and agriculture
 ̋LɂضO쌠ł̕SȎT{܂: Chisholm, Hugh, ed. (1911). "vL. Encyclop?dia Britannica (p) (11th ed.). Cambridge University Press.

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