| Analysis of nitrate in near-surface aquifers in the midcontinental United States; an application of the inverse hyperbolic sine Tobit model |
Zen, S.T.; Liu, Shiping; and Kolpin, D.W. |
Water Resources Research vol. 32, no. 10, pp. 3003-3011 |
1996 |
N/A
|
| Atrazine concentrations in near-surface aquifers; a censored regression approach |
Liu, Shiping; Yen, S.T.; and Kolpin, D.W. |
Journal of Environmental Quality vol. 25, no. 5, pp. 992-999 |
1996 |
N/A
|
| Pesticides in ground water; do atrazine metabolites matter? |
Liu, Shiping; Yen, S.T.; and Kolpin, D.W. |
Water Resources Bulletin vol. 32, no. 4, pp. 845-853 |
1996 |
N/A
|