. H. F.Blum, “Dimensions and Probability of Life,” Nature  206 (1965): 131.

. A. I. Oparin, Prioskhozhdenie Zhisny (Moscow: Izd. Moskovski Rabochii, 1924) (The Origin of Life, trans. Sergius Morgulis, 2d ed. [New York: Dover Publications, 1953]); idem, Genesis and Evolutionary Development of Life, trans. Eleanor Maas (New York: Academic Press, 1969); J. B. S. Haldane, “The Origin of Life,” Rationalist Annual 148 (1928): 3; S. L. Miller, “Production of Some Organic Compounds under Possible Primitive Earth Conditions,” Journal of the American Chemical Society 77 (1955): 2351. Some examples of subsequent work are found in S. L. Miller and H. C. Urey, “Organic Compound Syntheses on the Primitive Earth,” Science 130 (1959): 245; K. Harada and S. W. Fox, “Thermal Synthesis of Natural Amino‐Acids from a Postulated Primitive Terrestrial Atmospher,” Nature 201 (1964): 335; S. W. Fox, “Thermal Polymerization of Amino‐Acids and Production of Formed Microparticles on Lava,” ibid., p. 336; C. Ponnamperuma, “Chemical Evolution and the Origin of Life,” ibid., p. 337; M. Calvin, Chemical Evolution: Molecular Evolution towards the Origin of Living Systems on the Earth and Elsewhere (London: Oxford University Press, 1969); S. W. Fox and K. Dose, Molecular Evolution and the Origin of Life (San Francisco: W. H. Freeman & Co., 1972); S. L. Miller and L. E. Orgel, The Origins of Life on the Earth (Englewood Cliffs, N.J.: Prentice‐Hall, Inc., 1973).

. Blum (n. 1 above).