Stafford Cripps's Speech in the House of Commons opposing the National Government's decision to expand the Royal Air Force, api.parliament.uk. July 30, 1934.
"The Intelligent Investor: The Classic Text on Value Investing". Book by Benjamin Graham. Chapter I, What the Intelligent Investor Can Accomplish, p. 17, 1949.
"The Intelligent Investor: The Classic Text on Value Investing". Book by Benjamin Graham, Chapter II, The Investor and Stock-Market Fluctuations, p. 41, 1949.
Thomas Robert Malthus “An Essay on the Principle of Population, Or, a View of Its Past and Present Effects on Human Happiness: With an Inquiry Into Our Prospects Respecting the Future Removal Or Mitigation of the Evils which it Occasions”, Cambridge University Press