OKUMA Takashi
- A Study on the Artificial Break of Levee for Returning Inunndated Water to the River Channel. In: Historical Studies in Civil Engineering, v. 18 ( 1998). (1998):
- A Study on R. U. Brunton's Survey of the Mouth of the Shinano River. In: Historical Studies in Civil Engineering, v. 11 ( 1991). (1991):