TY - BOOK AU - Ackerman,D.J. TI - Hydrology of the Mississippi River Valley alluvial aquifer, South-Central United States U1 - 551.490977 PY - 1996/// CY - Washington, D.C. PB - United States Government Printing Office KW - Aquifers KW - Mississippi Embayment KW - Physical geology N1 - Includes eight colored folded plates in accompanying folder ER -