1. Standard methods for examination of water and waste water;American Public Health Association, Inc.,1965
2. Data of geochemistry;Clarke;U.S. Geol. Surv. Prof. Pap.,1924
3. Mechanisms controlling world water chemistry;Gibbs;Science,1970
4. Volatile preservatives for culture media;Hutner;Soc. Exper. Biol. Med.,1948
5. Chemical composition of rivers and lakes;Livingstone;U.S. Geol. Surv. Prof. Pap.,1963