The following was written by the Jefferson County (Missouri) Library:
The Jefferson County Library is proud to announce that they have indexed over 45 years worth of historical Jefferson County newspapers. Articles of genealogical interest pertaining to Jefferson County residents have been included in this database which is now available online at the library website.
The indexes may be searched alphabetically within each year or by using the search engine provided to search every year...

To access the index, simply log on to the Jefferson County Library website and follow the link at the bottom of the page to the Genealogy Department.