Grigorian, L.G. English : for the 7th form / by L.G. Grigorian, R.M. Aghvanian. - Yerevan : Louys, 1995. - 222 p. : ill. ; 21 cm. - 42-8(075) (NLA) . ISBN: 5545013008 Subjects--Topical Terms: English language--Textbooks. Universal Decimal Class. No.: 42-8(075) (NLA)