(1)
Seiya Nagaoka; Islam Mohammad Raihanul; Kenji Okajima; Ryoei Ito; Ken Watanabe; Tetsu Ito. EVALUATION OF ATTENUATION OF ULTRASONIC WAVE IN AIR TO MEASURE CONCRETE ROUGHNESS USING AERIAL ULTRASONIC SENSOR. INTERNATIONAL JOURNAL OF GEOMATE 2018, 14, 158-163.