http://www.mwac.nps.gov/where_to_see/missouri/index.html
Where to see archeology in Missouri with a map of  the state
http://coas.missouri.edu/mas/
The Missouri Archeological Society
With information about lectures, sites to visit
http://web.missouri.edu/~asm/main.html
The Archeological Survey of  Missouri
With information on who to contact if you find an archeological site
http://web.missouri.edu/~moarch/text/archmonth.html
Archeology month activities
http://www.uiowa.edu/~osa/nasa/in/missouri.html
Contact information for the state archeologist