Tran และ Thi Luu. (1999) Health center-curative service utilization in a commune of Vinhtuong district, Vinhphuc province, Vietnam. Mahidol University,:ม.ป.ท.Tran และ Thi Luu. 1999. Health center-curative service utilization in a commune of Vinhtuong district, Vinhphuc province, Vietnam. ม.ป.ท.:Mahidol University,;Tran และ Thi Luu. Health center-curative service utilization in a commune of Vinhtuong district, Vinhphuc province, Vietnam. ม.ป.ท.:Mahidol University, 1999. Print.