Beaumont, Digby The Heinemann ELT : Elementary English Grammar/ Digby Beaumont - Oxford : Macmillan-Heinemann, 1998 - 240 p. : ill ; 19x25 cm En la cub.: An elementary Reference and Practice Book ISBN: 0435283685 Subjects--Topical Terms: Lengua inglesa--Gramática Universal Decimal Class. No.: 811.111'36