Thi Hien To, Doan Thien Chi Nguyen, Xuan Vinh Le and Huu Huy Duong 2019. 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. 61, 2 (Jun. 2019), 79-83. DOI:https://doi.org/10.31276/VJSTE.61(2).79-83.