1. See, inter alia, Sidgwick, "The Covalent Link" (Cornell, 1933), p. 164. Lassettre, Chem. Rev., 20, 267 (1937); Pauling, "The Nature of the Chemical Bond" (Cornell, 1940), p. 290.
2. Copley, Marvel, and Ginsberg, J. Amer. Chem. Soc., 61, 3161 (1939).
3. Gordy and Stanford, J. Amer. Chem. Soc., 62, 497 (1940).
4. Hunter et al., "The Associating Effect of the Hydrogen Atom, Parts I–IX", J. Chem. Soc. (1937–1941).
5. Auwers, Z. phys. Chem., 30, 529 (1899).