Rubens Medina has been Law Librarian, Library of Congress, since 1994. He holds a law degree from the National University of Ascunción, Paraguay, and a Ph.D. in Law and Sociology from the University of Wisconsin. He has practiced and taught law in Paraguay and Chile, conducted research on land tenure and water rights in Latin America, and supervised research and publication on Latin American law in the Law Library, Library of Congress from 1971-1994. A specialist on the automated indexing and retrieval of primary-source legal information, he is Project Director of the Global Legal Information Network (GLIN), a multinational cooperative legal information system currently centered in the Law Library, Library of Congress.