@inproceedings{DAC-1972-Richardson,
	author        = "Fontaine Richardson",
	booktitle     = "{Proceedings of the Ninth Design Automation Workshop}",
	doi           = "10.1145/800153.804927",
	pages         = "34",
	publisher     = "{ACM}",
	title         = "{An interactive, graphical system for the design of photomasks}",
	year          = 1972,
}