To, Thi Hien, Nguyen, Doan Thien Chi, Le, Xuan Vinh, AND Duong, Huu Huy. "A comparison of PM2.5 and PAHs in ambient air between an urban background site and a background site in Ho Chi Minh city" Vietnam Journal of Science, Technology and Engineering [Online], Volume 61 Number 2 (14 June 2019)