Nguyen, Tuong Luan English for students of sea transport economic department and ship operators. - Hai Phong : Hai Phong Uninversity, 2010 - 230 tr.; 19 cm. Subjects--Topical Terms: Shipping Subjects--Index Terms: Viet Nam Demo database Koha Viet Nam LC Class. No.: PE1127 / .NG512L 1995