TY  - GEN
AU  - Helsel, D R
AU  - Hirsch, R M
TI  - Statistical Methods in Water Resources
T2  - Studies in Environmental Science 49
SN  - 0444885285
U1  - 519.502462 
PY  - 1992///
CY  - Amsterdam
PB  - Elsevier
KW  - Statistical Methods
KW  - Data Processing
KW  - Water Analysis
ER  -