Phannee Tansiri. (1980) A study on the design and construction of automatic ventilator. Mahidol University,:ม.ป.ท.Phannee Tansiri. 1980. A study on the design and construction of automatic ventilator. ม.ป.ท.:Mahidol University,;Phannee Tansiri. A study on the design and construction of automatic ventilator. ม.ป.ท.:Mahidol University, 1980. Print.