@book {Guettard1774a,
	title = {M{\'e}moires sur les diff{\'e}rentes parties de la physique, de l{\textquoteright}histoire naturelle; des sciences et des arts. Tome deuxi{\`e}me},
	year = {1774},
	pages = {530},
	publisher = {Costard},
	organization = {Costard},
	address = {Paris},
	keywords = {BL, JS, RCBS, TIP},
	url = {http://books.google.com/books?id=Sm0{\_}AAAAcAAJ},
	author = {Guettard, M}
}
@book {Guettard1774,
	title = {M{\'e}moires sur les diff{\'e}rentes parties de la physique, de l{\textquoteright}histoire naturelle; des sciences et des arts. Tome premier},
	volume = {1},
	year = {1774},
	pages = {439},
	publisher = {Costard},
	organization = {Costard},
	address = {Paris},
	keywords = {BL, JS, RCBS, TIP},
	url = {http://books.google.com/books?id=BW0{\_}AAAAcAAJ},
	author = {Guettard, M}
}
