Valencia, Pablo. En contacto ; a first course in Spanish / [electronic resource] / Pablo Valencia, Franca Merlonghi ; with the collaboration of Ferdinando Merlonghi ; annotations by Susan Cameron Bacon.. — Instructor's annotated ed.. — Boston, Mass. : : Houghton Mifflin,, 1980.. — 397 p. : : ill. 24 cm.
The instructor's annotated edition of En contacto consists of an instructor's guide (pages IAE-4 to IAE-13) and an annotated student text.