Wangchuk T, Lhendup T. Emission of Extremely High Concentrations of PM2.5 and Ultrafine Particles during Firewood Combustion. bjrd [Internet]. 2019 May 27 [cited 2024 Sep. 9];8(1):73-86. Available from: http://103.133.216.36/index.php/bjrd/article/view/45