Therein lies the rub.
Giangrego
Elizabeth
E
D049672:History, 19th Century; D049673:History, 20th Century; D049674:History, 21st Century; D049690:History, Ancient; D049691:History, Medieval; D006801:Humans; D014100:Toothpastes / Q000737:chemistry / Q000266:history*
D014100:Toothpastes