La nueva riqueza de las naciones

By Sorman, Guy. Buenos Aires Atlántida 1987 . 350 p. 9500807432

Call for the nineties : a computer technology in language learning

By Batley, Edward M.. s.l. Federation Internationale des Proffeseurs de Langues Vivantes 1991 . 62 p. 3818500738

By Alonso, Marisa. Buenos Aires Puerto de Palos 2002 . 315 p. 9505470457

By Hobsbawn, Eric J.. New York Vintage Books 1995 . 627 p. 06797300052