Wichai Premchaisavad. (1994) A Study on the design and construction of power measuring instruments for ultrasoundtherapy and short-wave diathermy equipments used in physical therapy. Mahidol University,:ม.ป.ท.Wichai Premchaisavad. 1994. A Study on the design and construction of power measuring instruments for ultrasoundtherapy and short-wave diathermy equipments used in physical therapy. ม.ป.ท.:Mahidol University,;Wichai Premchaisavad. A Study on the design and construction of power measuring instruments for ultrasoundtherapy and short-wave diathermy equipments used in physical therapy. ม.ป.ท.:Mahidol University, 1994. Print.