Eckstut, Samuela Focus on grammar : workbook: a basic course for reference and practice / Samuela Eckstut - London : Longman, c1994. - vi, 243 p. : ill. ; 27 cm. ISBN: 0201656833 LCCN: Subjects--Topical Terms: English languageworkbook LC Class. No.: PE1128 / .F555 1994 Dewey Class. No.: 428.24 / E19f