@book {Guettard1770,
	title = {M{\'e}moires sur diff{\'e}rentes parties des sciences et arts. Tome troisi{\`e}me},
	year = {1770},
	pages = {544},
	publisher = {Laurent Prault},
	organization = {Laurent Prault},
	address = {Paris},
	keywords = {BL, JS, RCBS, TIP},
	url = {http://books.google.com/books?id=PDcVAAAAQAAJ},
	author = {Guettard, M}
}
