@book {16221,
	title = {Primitiae Florae Amurensis},
	year = {1859},
	author = {Maxim.}
}
@book {16218,
	title = {Microtropis confertiflora,Microtropis tetragona},
	volume = {73},
	year = {1940},
	author = {E.D.Merrill \& F.L.Freeman}
}
@book {16158,
	title = {Die naturlichen Pflanzenfamilien,Zweite Auflage},
	volume = {20},
	year = {1942},
	author = {L.E.T.Loesener}
}
