"A Água na Agricultura" - Volumes I, II and IIIUnited States. National Archives and Records AdministrationP124_Box3INF4-General Correspondance1971-05-28letters (correspondence)booksAgricultural TextbooksARDOARDO Book ProgramARDO Administrative SupportBrazil--São Francisco River Valley (Minas Gerais-Alagoas and Sergipe)Rios, ReginaAuthorPerna, JimAddressee