1. Arnon DI, Allen MB and Whatley FR (1954) Photosynthesis by isolated chloroplasts. Nature 174: 394?396
2. Case AE (1958) Four Essays on Gulliver's Travels. Peter Smith, Gloucester, Mass
3. Clark-Kennedy AE (1929) Stephen Hales, D.D., F.R.S. An Eighteenth Century Biography. Cambridge University Press, Cambridge
4. Conant JB (1950) The Overthrow of the Phlogiston Theory. Harvard Case Histories in Experimental Science, Harvard University Press, Cambridge, Mass
5. Darwin F (1917) Rustic Sounds and Other Studies in Literature and Natural History. Reprinted 1969 by Books for Libraries Press, Freeport, N.Y.