(1)
Shenk, E. Puerto Rico and the United States: The Inclusion and Evolution of Language Policy in U.S. Congressional Bills, 1989-2010: PUERTO RICO AND THE UNITED STATES: THE INCLUSION AND EVOLUTION OF LANGUAGE POLICY IN U.S. CONGRESSIONAL BILLS, 1989-2010. recaesin 2015, N.ยบ 71, 103-118.