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Ground-water resources of the Açu Valley, Rio Grande do Norte, Brazil
1 online resource (iv, 34 pages) : illustrations, maps.
by Harry G. Rodis and Jonas María de Castro Araújo.
"Prepared in cooperation with the SuperintendeÌ²ncia do Desenvolvimento do Nordeste of Brazil under the auspices of the U.S. Agency for International Development."
"Contributions to the hydrology of Latin America and the Antilles."
Includes bibliographical references (page 34).
Geological Survey water-supply paper ; no. 1663-C