Biblio

B. Ye, Yang, L., Li, Y., Wang, W., and Li, H., “Water sources and their protection from the impact of microbial contamination in rural areas of Beijing, China”, International journal of environmental research and public health [Int. J. Environ. Res. Public Health], pp. p. 879 - 891; 3 fig.; 4 tab., 2013.

D. D. Mara, Bacteriology for sanitary engineers. Edinburgh, UK: Churchill Livingstone, 1974, p. x, 209 p. : fig.