"Principles of political economy considered with a view to their practical application". Book by Thomas Robert Malthus, Book II, Chapter I, "On the Progress of Wealth", Section IX, p. 403, 1836.
"Principles of political economy considered with a view to their practical application". Book by Thomas Robert Malthus, Book II, Chapter I, "On the Progress of Wealth", Section IX, p. 408, 1836.