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2. Water-level changes in the High Plains aquifer--predevelopment to 1991
3. Water-level changes in the High Plains Aquifer--predevelopment to 1990
4. Water-level changes in the High Plains Aquifer underlying parts of South Dakota, Wyoming, Nebraska, Colorado, Kansas, New Mexico, Oklahoma, and Texas : predevelopment through nonirrigation season 1987-88
5. Vertical gradients in water chemistry in the central High Plains aquifer, southwestern Kansas and Oklahoma panhandle, 1999
6. Relations of nonpoint-source nitrate and atrazine concentrations in the High Plains aquifer to selected explanatory variables in six Nebraska study areas
7. Reconnaissance of water quality in the High Plains Aquifer beneath agricultural lands, south-central Kansas
8. Percentage change in saturated thickness of the High Plains aquifer, west-central Kansas, 1950 to average 1988-90
9. Percentage change in saturated thickness of the High Plains aquifer, west-central Kansas, 1950 to average 1985-87
10. Nonpoint-source agricultural chemicals in ground water in Nebraska : preliminary results for six areas of the High Plains aquifer
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