1. Structural relations of UO2, isometric PbUO4, and orthorhombic PBUO4;Fondel;Acta Crystall,1958
2. Equipment for field measurement of electrochemical potentials;Back;U.S. Geol. Surv. Prof. Paper 424-C,1961
3. Equipment for field measurement of electrochemical potentials;Back;U.S. Geol. Surv. Prof. Paper 424-C,1961
4. Geochemistry of iron-rich groundwater of southern Maryland;Barnes;U.S. Geol. Surv. Prof. Paper 473-A,1964
5. Field measurement of alkalinity and pH;Barnes;U.S. Geol. Surv. Water-Supply Paper. 1535-H,1964