1. Barnes I. (1967) Personal communication.
2. Field measurements of alkalinity and pH;Barnes;U.S. Geol. Surv. Water Supply Paper 1535-H,1964
3. Isotopic fractionation in the system: calcite-graphite-carbon-dioxidemethane-hydrogen-water;Bottinga,1968
4. Oxygen isotope fractionation in the system calcium carbonate-water;Clayton;J. Chem. Phys.,1959
5. Standard for reporting concentrations of deuterium and oxygen-18 in natural waters;Craig;Science,1961