@book{229459,
	author = {Hart, Michael,},
	title = {Price/Cost Indexes from 1875 to 1989; Estimated to 2010},
	publisher = {Project Gutenberg,},
	year = {1993},
	note = {Originally published as a column entitled: The Rate of Change of the Rate of Change, in the Electronic Journal of Virtual Culture},
	url = {http://www.gutenberg.org/ebooks/88}
}