@book {1424,
	title = {Pteridospermae, Cycadofilices, Cordaitales, Cycadophyta},
	series = {Fossil Plants, a Text-book for students of Botany and Geology},
	volume = {3},
	year = {1917},
	pages = {656},
	publisher = {University Press},
	organization = {University Press},
	address = {Cambridge},
	url = {http://books.google.nl/books?id=lpg4AAAAIAAJ},
	author = {Seward, A.C.}
}
@article {633,
	title = {Ueber Deckenbau im Gebiet von Djambi},
	journal = {Verhandlungen der Naturforschenden Gesellschaft in Basel},
	volume = {28},
	year = {1917},
	pages = {123-147},
	chapter = {123},
	url = {http://biodiversitylibrary.org/page/32329391},
	author = {Tobler, Aug.}
}
