1. Equipment for field measurement of electrochemical potentials;Back;U.S. Geol. Surrey Prof. Paper,1961
2. Field measurement of alkalinity and pH;Barnes;U.S. Geol. Survey Water Supply Paper,1964
3. Determination of pH Theory and Practice;Bates,1973
4. The waters of Hot Springs National Park, Arkansas—their origin, nature and management;Bedinger;U.S. Geol. Surv, open-file report,1974
5. Methods for collection and analysis of water samples for dissolved minerals and gases;Brown;U.S. Geol. Surv., Techniques of Water Resources Inv.,1970