Baugh, L. Sue Essentials of english grammar a practical guide to the mastery of english - 2nd ed. - Lincolnwood NTC Publishing Group 1993 - 145 p. - Passport books . ISBN: 0-8442-5821-0 Subjects--Topical Terms: ENSENANZA DE IDIOMASLENGUA EXTRANJERAINGLESACTIVIDADES DE APRENDIZAJEGRAMATICA