"Kensetsujigyō." . . "建設事業" . . . "Dobokukōgaku." . . "土木工学" . . . . . . . . . . . . . "History" . "Doboku gijutsu no hatten to shakai shihon ni kansuru kenkyū"@ja . . "土木技術の発展と社会資本に関する研究" . . . "Doboku gijutsu no hatten to shakai shihon ni kansuru kenkyū" . . .