TY - BOOK AU - Taylor,Howard E. TI - Major ions, nutrients, and trace elements in the Mississippi River near Thebes, Illinois, July through September 1993 T2 - U.S. Geological Survey circular AV - TD224.I3 M35 1994 U1 - 551.48/3/09773999 20 PY - 1993/// CY - Washington, D.C. PB - U.S. G.P.O. KW - Water quality KW - Illinois KW - Thebes Region KW - Local KW - Mississippi River Valley N1 - Includes bibliographical references (p. 7-8) ER -