Gray versus Malthus, or, The principles of population and production investigated - and the result found to be that population regulates subsistence, not subsistence population, while the increase of population, far from tending to overstock, and to produce poverty and distress, is the grand source of the permanent increase of wealth, and of amplifying the means of employment and happiness

Förlag	År	Ort	Om boken	ISBN
Longman, Orme, and co., Printed by Moyes and Barclay	1840	England, London, London	xiv, xi, 496 sidor.
Printed for Longman, Hurst, Rees, Orme, and Brown, S. Gosnell	1818	England, London, London	xi, 507 sidor. 24 cm.