@inproceedings{DRR-2007-LangleyB,
	author        = "Adam Langley and Dan S. Bloomberg",
	booktitle     = "{Proceedings of the 14th Conference on Document Recognition and Retrieval}",
	doi           = "10.1117/12.710609",
	isbn          = "978-0-8194-6613-6",
	publisher     = "{SPIE}",
	title         = "{Google Books: making the public domain universally accessible}",
	year          = 2007,
}