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61
The economics of irrigating sugarcane farms in San Carlos Milling District, 1967-1968 [microform]
Published 1977Visual Material -
62
The economics of irrigating sugarcane farms in San Carlos Milling Districts, 1967-1968
Published 1977Visual Material -
63
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69
Preliminary analysis of the effect of pump irrigation on farmer's income [microform]
Published 1973Visual Material -
70