Eckstut, Samuela Beneath the surface / Samuela Eckstut and Diana Lubelska - London : Longman, c1989. - 79 p. : ill., figs., tabs. ; 24 cm. ISBN: 0582791111 LCCN: Subjects--Topical Terms: EnglishGrammar LC Class. No.: PE1114 / . 1989