@book{26735,
	author = {Heer, Oswald, and Nordenskiöld, A. E.},
	title = {Beiträge zur fossilen Flora Spitzbergens :},
	publisher = {P.A. Norstedt & söner,},
	year = {1876.},
	address = {Stockholm :},
	note = {Also published as bd. 4, pt. 1 of: Flora fossilis Arctica / von Oswald Heer.  Zürich : F. Schulthess, 1868-1883.}
}