Lewis, Richard D. Reading for adults / by R.D. Lewis. - [Harlow, UK ] : Longman, 1971-1973. - 2 v. : ill. (some col.) ; 25 cm. ISBN: 0582527902 (Bk. 1) 0582527910 (Bk. 2) Subjects--Topical Terms: English language--Textbooks for foreign speakers.