TY - JOUR A1 - Cunningham, J A A1 - Goltz, M N A1 - Roberts, P V T1 - Simplified expressions for spatial moments of groundwater contaminant plumes Y1 - 1999/10/ N1 - R824768 JF - JOURNAL OF HYDROLOGIC ENGINEERING VL - 4 IS - 4 SP - 911 EP - 380 PB - American Society of Civil Engineers ER -