1. See, for example, the selected works of Mao Tse Tung, unrevised version, Foreign Language Press, Peking (1967).
2. H.David Politzer, ‘Still QCD-ing’, Lectures presented at the Eighth Hawaii Topical Conference, Caltech-68–745 (1979).
3. S.L.Glashow and S.Weinberg, Phys. Rev., D15, 1958 (1977).
4. See, for example, H.D.Politzer, Phys. Rep., 14C, 129 (1974); W.Marciano and H.Pagels, Phys. Reports, 36C, 139 (1978).
5. T.Appelquist and H.Georgi, Phys. Rev., D8, 4000 (1973);