IF you're still looking for these obits, you can contact the Dunklin County Genealogical Society, 573-888-3561. They're not online.
Hopefully they can look up Nettie's death date for you.
If they don't look up obituaries, you can contact the State Historical Society of Missouri, http://shs.umsystem.edu/newspaper/
. They have the largest collection of newspapers on microfilm in the State. Successful Searching!