Helgesen, Marc English Firsthand 2 / Marc Helgesen - 1st ed - Hong Kong : Longman Asia ELT, 2005 - 144 p. CD-ROM 29 แผ่น ISBN: 9620053478 Subjects--Topical Terms: English Language--EducationEnglish language--Grammar LC Class. No.: PE1112 / H474 E5 2005