REFERENCES AND FURTHER READING
Paul Davies , Superforce: The Search for a Grand Unified Theory , Touchstone Books , New York (1985) .
National Research Council , Astronomy and Astrophysics for the 1980s , National Academy Press , Washington, D.C. (1982) .
National Research Council , Gravitation, Cosmology, and Cosmic-Ray Physics, in Physics Through the 1990s , National Academy Press , Washington, D.C. (1986) .
National Research Council , The Decade of Discovery in Astronomy and Astrophysics , National Academy Press , Washington, D.C. (1991) .
Graham G. Ross , Grand Unified Theories , Benjamin/Cummings Publishing Co., Inc. , Menlo Park , California (1984) .
Joseph Silk , The Big Bang , W.H. Freeman and Co. , New York (1989) .
Steven Weinberg , The First Three Minutes: A Modern View of the Origin of the Universe , Basic Books , New York (1988) .