María Teresa Viñas Urquiza, M. A, linguist, (Northwestern University; III. USA); former researcher (Universidad de Buenos Aires, Argentina); lawyer (Universidad de Buenos Aires, Argentina) and teacher of English (Universidad Nacional de Córdoba, Argentina) has a long standing commitment with the study and teaching of languages. Author of the award-winning Lengua Mataca I & II (1974, Fac. de Filosofía y letras, UBA) and Fonología de la Lengua Mataca (1970, Fac. de Filosofía y letras, UBA), profesor Viñas Urquiza has lectured widely in the field of Contrastive Analysis, which is one of her current research interests. She is at present tenure professor of Contrastive Analysis at IES en Lenguas Vivas "J. R. Fernández" (Buenos Aires, Argentina); of English Grammar and Contrastive Analysis at Escuela Normal Superior en Lenguas Vivas "J. F. Kennedy" (Buenos Aires, Argentina) and lecturer at Universidad Nacional de Litoral (Santa Fe, Argentina); Universidad de Belgrano y Universidad de Buenos Aires.