Wanratchanee Akrawiputh. (1990) The study on the performance of single use respirator containing with coconut shell-activated carbon against benzene inhalation. Mahidol University,:ม.ป.ท.Wanratchanee Akrawiputh. 1990. The study on the performance of single use respirator containing with coconut shell-activated carbon against benzene inhalation. ม.ป.ท.:Mahidol University,;Wanratchanee Akrawiputh. The study on the performance of single use respirator containing with coconut shell-activated carbon against benzene inhalation. ม.ป.ท.:Mahidol University, 1990. Print.