An, Ngo, 		Lan, Ngo, 		Cong, Vo, 		Duong, Nong, AND 		Huong Giang, Nguyen.
" Environmental Pressure from Pig Farming to Surface Water Quality Management in Yen Dung District Bac Giang Province" <em>VNU Journal of Science: Earth and Environmental Sciences</em> [Online], Volume 36 Number 1 (15 March 2020)