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91
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98
Irrigation capability of the Penaranda river irrigation system and of the Sta. Cruz river irrigation system [microform]
Published 1977Visual Material -
99
The economics of irrigating sugarcane farms in San Carlos Milling District, 1967-1968 [microform]
Published 1977Visual Material -
100
Water balance study of the north zone of the Magat River Irrigation System, Isabela [microform]
Published 1977Visual Material