Keiichi Koyama
- Study On Modelling Procedure Of Station-type-collection Of Municipal Solid Waste. In: 土木学会論文集 (Doboku Gakkai rombunshū), v. 1987, n. 377 (January 1987). (1987):
- Study On Production Process Of Soluble Pollutants In Anaerobic Landfill Layer Of Municipal Solid Waste. In: 土木学会論文集 (Doboku Gakkai rombunshū), v. 1987, n. 381 (May 1987). (1987):
- Study On Seasonal Fluctuation Of Collected Amount Of Municipal Solid Waste. In: 土木学会論文集 (Doboku Gakkai rombunshū), v. 1988, n. 393 (May 1988). (1988):