C. R. "Chuck" Downing shared - Authors Bureau ECN: Speak with a favorite author by phone

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C. R. "Chuck" Downing shared: 8/19/2017 2:05:08 AM

#SciFact There are more than 500 species of bacteria in a healthy mouth. @SherryFrazier https://t.co/KXPE2tQpQR
— C.R. Downing (@CRDowningAuthor) August 19, 2017