Obrom Sinpibam Handbook of English tenses / [book] Handbook of English tenses with anser key Obrom Sinpibam, Kanok-Karn Sinpibarn - Bangkok : P.C.Book Distributor, 2008. - 176 p. ISBN: 9789747040500 Subjects--Topical Terms: English language--Tense. LC Class. No.: PE1301 / .O13