@book{70309,
	author = {Digital Equipment Corporation},
	title = {Preliminary Specifications: Programmed Data Processor Model Three (PDP-3) :},
	publisher = {Project Gutenberg,},
	year = {2009},
	address = {Salt Lake City, UT :},
	note = {Release date is 2009-07-20},
	url = {https://www.gutenberg.org/ebooks/29461}
}