by Roderick F. Ortiz
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Water-quality assessment of the Arkansas...
Ground-water quality of alluvial and sed...
Ground-water quality of granitic- and vo...
Baseline characterization of water quali...
Characterization of water quality in sel...
Diurnal variations in metal concentratio...
Acid Mine Drainage, Rock Drainage, and A...
Acid Mine Drainage
Acid-neutralizing potential of igneous b...
Sources of coal-mine drainage and their ...
Effects of coal-mine discharges on the q...
Final close-out report