549.759 549.760 549.761 LONGMAN Longman active study dictionary of English / ed.--in-chief Della Summers ; senior ed. Adrian Stenton ; eds. Adam Gadsby, Michael Upshall, Janet Whitcut. - [Harlow] s [Longman Group UK Ltd], [1988]. - 26, tyO s. i il. t 20 cm ISBN 0-582-55632-5