ปรีย์มาโนช ป. . . (2020) “Influence of Sludge Sample Concentration on Heterotrophic Bacteria Yield Estimation by Using Oxygen Uptake Rate Measurement Method”, Engineering and Technology Horizons , 33(4), pp. 32–39. Available at: https://ph01.tci-thaijo.org/index.php/lej/article/view/241386 (Accessed: 19 May 2024).