Del tributo a la soberanía comunitaria
Autor:Roth Seneff, Andrew; Kemper, Robert V.; Adkins, Julie; Weigand, Phil Clayton; Pollard, Helen Perlstein; Roskamp, Johannes H.C. Hans; Castro Gutierrez, Felipe; Román Gutiérrez, José Francisco; Liffman, Paul; Gledhill, John