ROS, PHOURA. 6-m3 biodigeter construction process and its effectiveness (ដំណើរការសាងសង់និងប្រសិទ្ធភាពឡជីវឧស្ម័នទំហំ៦ម៣) - Phnom Penh RUA 2010 - xii, 58p. ill. 29cm. Dewey Class. No.: ATM ROS 2010 B197 Or.1