ID:DA14248933
Philippines (Republic). National Irrigation Administration
Philippines. Irrigation Administration, National
Philippines. Pambansang Pangasiwaan ng Patubig
Philippines. Patubig, Pambansang Pangasiwaan ng
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Romana P. de los Reyes ... [et al.]
Institute of Philippine Culture, Ateneo de Manila University 1980
Available at 3 libraries
