@book{77185,
	author = {Ricardo, David, and Bonar, James,},
	title = {Letters of David Ricardo to Thomas Robert Malthus, 1810-1823},
	publisher = {Project Gutenberg,},
	year = {2011},
	address = {Salt Lake City, UT :},
	note = {Release date is 2011-06-07},
	url = {https://www.gutenberg.org/ebooks/36345}
}