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| | EPA: Pesticides - Dunklin County, Missouri |
 | | It now is believed to be found in a small, undredged portion of the St. Francis River in St. Francis County, Arkansas. |
 | | Few specimens were found in the mid-1970's in the Wabash River in Posey County, Indiana and a small tributary in Pike County, Indiana but is uncertain whether the fat pocketbook populations in these areas are still viable and reproducing. |
 | | Major factors affecting these mussel populations are alterations in temperature, waterflow, and siltation caused by stream damming, channeling, and dredging. |
| www.epa.gov /oppfead1/endanger/missouri/dunkl.htm (411 words) |
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