These may be of particular interest:
http://www.fluorideaction.org/images...pa-masters.jpg --from the EPA
http://www.fluoridealert.org/topical-systemic.htm --I liked the analogy of swallowing sunscreen to prevent sunburn!
http://www.fluoridealert.org/who-dmft.htm --of particular interest, this one addresses decline of tooth decay in fluoridated vs. unfluoridated countries